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TTS-100 TELEPHONE TEST SYSTEM REFERENCE MANUAL
DPL TELECOM TECHNIQUES REV. 2.2
Table of Contents
1.1 Description of the TTS-100 1.2 Equipment Supplied with the TTS-100 1.3 Equipment Required to Use the TTS-100 2.1 Installing the TTS-100 Hardware 2.2 Installing the TTS-100 Software 4.2.1 CLASS Transmission Level 4.2.3 Number of Seizure Bytes of 55 4.2.4 Number of Mark Bytes of FF 4.2.6 Main Message Type Number 4.2.7 Time to Wait After Ringing 4.2.9 Multiple or Single Message Type 4.2.11 Ringing Frequency and Level 4.2.12 Message Type and ASCII Data 5.2.1 Address/Data Mode - Manual Entry 5.2.2 Address/Data Mode - Auto Execute 5.2.3 Address/Data Mode - Create a File 6.0 EBS Command Set and Address Configuration 6.2 CO to Primary Set Commands 6.3 CO to Display Set Commands 6.5 CO to 18 Button Add-On Commands 6.6 CO to 20 Button Add-On Commands 6.7 CO to 36 Button Add-On Commands. 6.6 CO to 22 Button Add-On Commands 8.0 Warranty and Technical Support.
1.0 Introduction
The TTS-100 is a unit designed to simulate a Central Office switch. You may test both EBS and POTS phones, or place calls from one type to the other.
This manual contains all of the information necessary to set up your unit and configure all of the tests it will perform. 1.1 Description of the TTS-100
The TTS-100 is a telephone test system for Northern Telecom EBS and POTS telephone sets. It operates from a PC serial port. The software will run under MS-DOS or a Windows DOS prompt. The TTS-100 will simulate short, medium, and long loop lengths and performs the following test functions:
EBS Mode:
1. Reset the sets under test and give a visual indication of what sets (addresses) are connected. 2. Loop Back and Display Status Request tests in Auto Mode. 3. Send a user defined message to the display. 4. Strobe (Wink, Flash, Turn On and Off) all the LCD indicators on the sets under test. 5. Buzz or ring the phone. Turn on and off, flash, and wink any key using simple commands. 6. Send an EBS command to the set by entering the address location of the set and the hex command code. 7. Create automatic test routines, which can be saved and executed multiple times. Test routines are specified as sequences of EBS commands and pauses. 8. Display all ‘Phone to CO’ signaling codes of the modules under test. Supports addresses 0 - 3. 9. Reverse the polarity of the tip and ring to test for reversed cords. 10. Measure the level of 8 kHz signaling from the phone or add-on. 11. Measure the acknowledge signal in response to a ‘from CO’ EBS code. 12. Measure the active and idle DC currents drawn from the CO’s talk battery. 13. Provide VU indication of mic transmission level on the PC screen. 14. Send CO call progress tones: busy, dial tone, ring back, and 1 kHz. 15. Connect an external speaker to monitor voice quality. 16. Test add-on modules without a primary set connected. 17. An Auto Mode test series can be defined by a supervisor. The operator is prompted to perform the tests. Results are tabulated when the Auto Mode series is complete and Pass/Fail results are clearly stated. Many different Auto Mode configurations may be created to allow testing of different sets or add-on modules.
1. Send power ringing to a set. The ringing frequency may be user defined as 20 or 30 Hz and the ringing level is adjustable in 98 steps. 2. Test touch tones (DTMF). 3. Test repertoire memory and redial sequences and digit/interdigit times. 4. Test pulse dial. The percent break and pulsing speed are displayed. 5. Measure the Release and Link key break times. (On-hook time) 6. Test the Extension In Use (EIU), Feature In Use (FIU), and Hold indicators. 7. Reverse the polarity of the tip and ring. 8. Test the neon lamp on Unity type sets. 9. A-Leads open or closed test (Unity type sets). 10. Send CLASS signaling (Caller Line ID, Caller ID on Call Waiting, Name and Visual Message Waiting) with or without ringing. 11. Test for handset noise. 12. Voltage probe test to indicate a tip or ring short to the phone’s base. 13. Measure the DC current drawn from the tip and ring on and off-hook. 14. Provide a visual indication of the mic transmission level on the PC screen. 15. Send CO call progress tones: busy, dial tone, ring back, and 1 kHz. 16. Monitor voice quality by connecting an external speaker. 17. Define Auto Mode tests that prompt the user to perform the tests. Results are tabulated when the Auto Mode sequence is complete and Pass/Fail results are clearly stated. Many different auto mode configurations can be created to allow testing of different sets.
1.2 Equipment Supplied with the TTS-100
The following items are supplied with the TTS-100 at the time of purchase:
· User’s Manual · Reference Manual · 9 pin to 9 pin (m-f) straight through serial cable · 9 pin male to 25 pin female adapter · TTS-100 unit · Voltage Probe · 3½" HD software diskette (1.4 Mb) 1.3 Equipment Required to Use the TTS-100
The following items are required for the TTS-100 to operate:
· MS-DOS compatible computer with serial port COM1 or COM2 available and 640K RAM. · MS-DOS version 3.0 or higher · Hard disk if program speed is important · External speaker if required (8-32 W)
1.4 Technical Specifications
CAUTION: . Use your scope’s differential mode when measuring tip and ring signals. Do not connect the tip of the phone line to ground. It will cause internal damage to the TTS unit.
Power: 115 Vac ± 10%, 60 Hz, 60 W, MOV Surge Protected at 130 Vac. External fuse: 0.5 A slow blow, 5 X 20 mm, 125 Vac. Weight: 4.6 kg (10.12 lbs). Size: 24.4 cm x 23.6 cm x 10.4 cm (9.6" L x 9.3" W x 4.1" H) Case: 18 gauge steel painted two tone ivory. The case is vented for heat dissipation. Phone Connection: Five RJ-12, 6 pin modular connectors. · Three parallel EBS jacks. · Two parallel POTS jacks. Computer Connection: DB-9, RS-232C female connector. Computer to TTS-100 protocol: RS-232C serial, 9600 baud, no parity, 8 data bits, 1 stop bit, software handshaking. Voltage Probe and External Speaker connector: 3 position terminal strip.
Electrical Specifications:
Voltage probe input impedance: 470 kW Voltage probe threshold: 1.1 Vdc wrt tip side of talk battery Open circuit DC talk battery voltage: 52 ± 0.2 Vdc POTS Short Loop Length: 400 W Battery Feed (Range: 390 - 480 W, 480 if unit is warm) POTS Medium Loop Length: 400 W Battery Feed + 620 W Line POTS Long Loop Length: 400 W Battery Feed + 1240 W Line POTS Very Long Loop Length: 400 W Battery Feed + 1500 W Line EBS Short Loop Length: 440 W Battery Feed (Range: 430 - 520 W, 520 if unit is warm.) EBS Medium Loop Length: 440 W Battery Feed + 620 W Line EBS Long Loop Length: 440 W Battery Feed + 1230 W Line Battery feed for EBS line with POTS line also engaged (in CO Emulator mode): 440 W Battery Feed + 920 W Line EBS jack third pair supply: 16 Vac at 140 mA, short circuit protected Neon lamp test voltages: High setting: 120 ± 0.5 Vdc no load Low setting: 100 ± 1.5 Vdc no load Neon lamp test voltage source resistance: 180 W (In Very Long loop mode add 1500 W to source resistance.) Maximum continuous current available before trip: 8.5 ± 1.5 mA.
POTS line AC impedance: 600 W ± 10%, 350 Hz - 4000 Hz EBS line AC impedance: 900 W ± 10%, 500 Hz - 8000 Hz (790W @ 350 Hz).
Note: All AC levels are measured with a 900 W + 2.2 mF termination for the EBS line, and a 600 W + 2.2 mF termination for the POTS line.
EBS Short loop 8 kHz signal level: 1.30 Vp-p (with AC transmit level set to 100%) EBS Medium loop 8 kHz signal level: 416 mVp-p (with AC transmit level set to 32%) EBS Long loop 8 kHz signal level: 65 mVp-p (with AC transmit level set to 05%) EBS CO Emulator signal level: 220 mVp-p 8 kHz receive level: 40 mVp-p to 1.5 Vp-p 8 kHz receive frequency limits: 7.1 to 9.0 kHz Measure EBS level range, accuracy: 0.2 to 2.0 Vp-p, ±0.1 Vp-p Measure EBS Ack stop time: 16.25 to 19.75 ms, in 0.25 ms steps.
Voice band loop attenuation: 0 dB-Short, 10 dB-Medium, 20 dB-Long, user definable. POTS to EBS voice path gain, CO simulation: -6 dB EBS to POTS voice path gain, CO simulation: -5 dB
Call progress tone levels at 100%: dBm = POTS, mVp-p = EBS test phone mode) Dial tone: -7.8 dBm, 380 mVp-p per tone Ring back: -12 dBm, 246 mVp-p per tone Busy tone: -16 dBm, 138 mVp-p per tone EBS Alert: N/A, 860 mVp-p each tone 1 kHz tone: -1 dBm, 830 mVp-p
Call progress tone frequencies and tolerances: Dial tone: 350 Hz + 440 Hz, ± 0.05% Ring back: 440 Hz + 480 Hz, ± 0.05% Busy tone: 480 Hz + 620 Hz, ± 0.05% EBS Alert: 500 Hz and 670 Hz warbled at a 10 Hz rate, ± 0.05% CLASS Specification: Transmission scheme: Analog, phase coherent FSK Logical 1 (Mark): 1200 ± 2 Hz Logical 0 (Space): 2200 ± 4 Hz Transmission rate: 1200 bps Application of data: serial, binary, asynchronous Transmission Level: 550 mVp-p at 100% setting, into 900W, User definable in 1% steps. Maximum twist (wrt mark): 0 dB to +1.5 dB (0.8 dB typ.) Maximum number of bits sent: 2040 bits (1.7 seconds) SAS Signal: 440 Hz, 300 ms duration, 560 mVp-p. CAS signal: 2130 Hz + 2750 Hz, 82 ms duration, 490 mVp-p per tone.
DTMF transmit level (EBS line, CO Emulation): 275 mVp-p/tone DTMF receiver specification (POTS line, short loop): Valid input AC signal level: +1 to -29 dBm per tone Twist acceptance: ±10 dB Frequency deviation acceptance: ± 1.5% ± 2 Hz Frequency deviation rejection: ± 3.5% Minimum tone duration/loss: 35 ms/30 ms (The TTS-100 will report fourth column tone pairs.)
Power ringing frequency: 20 Hz or 30 Hz sine wave, user selectable. Power ringing level: 100 Vac, ±5%, no load, software adjustable ringing level. Power ringing output impedance: 2.6 kW typical, short loop, includes 400W battery feed resistance, (add 1500 W loop resistance for very long loop.) Ring trip current: 7 ± 3 mAdc, 44 ±8 mAac. On-hook trip current and pulse dial threshold: 11 ± 3 mA. Key timing (link and release) length and resolution: 1 to 8191 ms ± 1.5 ms max.
POTS DC current measurement: 0-15 mA ± 0.5 mA, 15-130 mA ± 2 mA. EBS DC current: 0-15 mA ± 1 mA, 15-130 mA ± 2 mA
2.0 Installation
This section describes the hardware and software installation procedures for the TTS-100. It covers both hard and floppy disk types. This software is not copy protected and may be installed on as many computers as required.
Version 2.2 requires that the internal EBS controller version be “32”. Contact DPL if a message appears on entry to the EBS Mode or POTS Mode option stating that some features are not available. All features which were available in version 1.8 are still available in 2.2 without the “32” controller.
2.1 Installing the TTS-100 Hardware
A 9 pin serial cable and a 9 to 25 pin adapter are shipped with each unit. Use the cable, and the adapter if necessary, to connect the TTS to your PC's serial port jack COM1 or COM2.
There is one EBS line and one POTS line in the TTS unit. Three EBS jacks are wired in parallel on the front of the unit. Two POTS jacks are also wired in parallel on the front of the unit. Connect the test phone to any one of the appropriate jacks.
When connecting a phone unit ensure you use the correct cords. The EBS set requires six wire cords, pair 1 (inside pair) for signaling and voice, and pair 3 for powering the set’s display, speaker phone, and add-on modules. POTS phones use two or four wire cords, the first pair for signaling and the second pair for A-leads.
2.2 Installing the TTS-100 Software
The TTS software and hardware have been proven to work on the following computers:
· 386 & 486 Clones, 40 MHz/33 MHz, EGA and VGA · Hewlett Packard XT, 8 MHz, MDA and Hercules · Gateway, 486 33 MHz, SVGA
Difficulties may be experienced when using:
· Wang computers running IBM emulation mode · IBM PS/2 with built-in PS/2 mouse port.
The highlighting attribute of some of the indicators may not function on some versions of monochrome, color emulating LCD screens. 2.2.1 Hard Disk Operation
Once at the DOS prompt, you may install the TTS software onto your hard disk. Listed below are step by step instructions for installing the TTS software. After typing any line shown below, press the ENTER key.
Insert the TTS software diskette into a disk drive.
The TTS software is provided on a 3½" HD diskette (1.4 Mb). The diskette contains all programs and related files to run the TTS software.
Type: <drive>:
Where <drive> is the letter corresponding to the drive in which you inserted the TTS diskette.
Type the following line taking note of the spaces. Refer to the README file on the diskette if you are upgrading from version 1.8.
Type: NEWINST C: \TTS100
The default company name at the top of every screen is ‘DPL Telecom Techniques’. Change the <logo.txt> file if you wish to change it.
2.2.3 Floppy Disk Operation
To run the software from the floppy disk, first create a working copy of the original diskette. Then insert the working copy into the disk drive and type the following commands: <drive>: TTS100
Where <drive> is the letter corresponding to the drive in which you inserted the TTS software diskette.
The TTS-100 unit may issue error messages to the TTS-100 PC software. Press escape to erase an error message. If an error message occurs, it is recommended that you return to the Opening Menu and begin
again. Warning messages are just intended to notify the user of a less
important message. 3.0 Using the Software
When executing the software for the first time, a message will appear asking you to select which COM port you wish to have communicate with the TTS-100. COM ports 1 and 2 are supported in the TTS software.
After selecting the correct COM port, the TTS-100 menu will be displayed and you may select an option.
3.1 Opening Menu
This menu allows you to select the appropriate line for the type of phone you will be testing. You may also setup communications with the unit or shell to DOS. The opening menu will appear as follows:
To choose a selection enter the digit/letter that corresponds to the desired selection, or use the cursor direction keys to move the highlight bar to the desired selection and press ENTER.
The EBS Menu and POTS Menu options allow you to perform a variety of tests on a phone. See sections 4 and 5 for details on the available tests. The TTS will reset every time you select options 1 and 2 from this menu.
Version 2.2 software has two additional items added to this menu. They allow a supervisor to edit and create phone configuration files without having a TTS-100 unit connected to the serial port. The same password is required for these options as is required for the “Z” option from within the EBS and POTS Modes.
You may connect an external speaker to the TTS. F5 allows you to adjust the volume of the speaker from 0-9.
3.2 System Set up
This option allows you to set up communication with your TTS unit. You may reconfigure which COM Port you wish to have communicate with the TTS by selecting either COM1 or COM2.
You may also enable the audible fail alarm in this screen. Enabling the alarm will cause the computer to beep every time a test fails. This may be particularly useful with tests run in the Auto Mode. Use the F4 function key to toggle between ‘Enabled’ and ‘Disabled’.
4.0 POTS Model
The POTS Interactive Menu allows you to test various features of the phone. Once a test is complete, the software will return to this menu. You may select an option by pressing the letter corresponding to your desired selection.
Upon start up of the TTS software the test parameters will default to the <defaults.pfg> file. You may edit the parameters from within each test option, and perform the tests using the specified limits. However, these are local configurations only and will not become permanent until the Configuration Files option is selected and they are saved to a file. If you exit the Interactive Menu without saving the test parameters, all configurations will be lost.
4.1 Auto Mode
The Auto Mode allows you to run a series of tests that must be previously set up in the Supervisor Mode. The tests will be executed in succession and a report summary of the Pass/Fail status will be displayed once all tests have been completed. For descriptions of the various tests available in the Auto Mode refer to section 4.15.1.
During the execution of the various Auto Mode tests the following keys are used:
SPACE Causes the next test to be started. It the previous test was complete it will report the test as ‘Passed’. If the previous test was incomplete it will be labeled as ‘failed’.
X Advances to the next test and labels the current test as ‘failed’.
R Will repeat the current test.
Backspace Will back up to the previous test.
F1 Offers help on the current test.
F5 F5 allows you to change the external speaker’s volume level.
ESC Returns you to the Interactive Menu.
A summary of each test along with their respective Pass/Fail status will be displayed once the last test in the Auto Mode sequence has been completed. The three status types for each test are: Pass, Fail and N/A (Not Applicable).
4.2 CLASS Signaling
CLASS is an acronym for Customized Local Access Signaling Service, and represents Calling Line ID (CLID), Caller ID on Call Waiting (CIDCW), Visual Message Waiting and Name Display. It also contains all of the framing and formatting information sent from the CO.
CLASS can be sent to the phone in the on-hook or off-hook state. It is sent as modem-like FSK analog signaling.
The on-hook signaling data consists of first sending 250 ms of the 55 hex byte with no start or stop bits. This creates a bit pattern carrier of a 600 Hz square wave. The second part of data consists of sending 150 ms of ‘mark’ or idle state. The idle state is sent as 22 bytes of FF hex with no start or stop bits. The remaining information is that which the receiving device interprets as Calling Line ID, Date and Time, Call Qualifiers, Names, Message Waiting Indicators, etc.
Off-hook CLASS is not sent with seizure bytes or mark bytes. It consists of first sending 300 ms of SAS signaling and then sending an 82 ms burst of CAS signaling. The TTS then waits for a DTMF ack from the phone. Once the correct DTMF ack has been received, the TTS transmits the CLASS data to the phone.
in the ASCII format. A Type Identifier byte and a Packet Length byte precede the data.
The Multiple Data Message Format is used to service POTS lines that support more than one feature. It is sent as a sequence of messages each containing a message header and message body. The message header defines the message type and length. The message body contains the main message for the packet. A modulo 8 checksum is appended to the end of the data. The TTS-100 is limited to sending 2040 bits of CLASS signaling (1.7 seconds).
This option is used to test CLASS capable phones, external units, and Visual Message waiting indicators by sending a user defined message to the POTS phone. It provides a method of formatting the CLASS information being sent to the phone. The CLASS signaling level can also be altered from within this option. The following parameters must be defined when sending CLASS:
1. CLASS Transmission Level 2. Loop Length for CLASS 3. Number of Seizure Bytes of 55 4. Number of Mark Bytes of FF 5. Number of Stop Bits 6. Main Message Type Number 7. Off-hook Ack DTMF 8. Time to Wait After Ringing 9. Multiple or Single Message Type 10. When to send CLASS 11. Ringing Frequency and Level 12. Message Type and ASCII Data
4.2.1 CLASS Transmission Level
The level at which you want to transmit CLASS is entered in this field. It is to be specified as a percentage of the maximum level of 550 mVp-p into 900 W (-14 dBm). The default percentages are 100% for short loop, 25% for medium loop, and 12% for long loop.
4.2.2 Loop Length for CLASS
The F7 function key toggles the DC loop length used in the CLASS screen. The CLASS loop length is not affected by the POTS Interactive Menu 1,2,3 or 4 keys. 4.2.3 Number of Seizure Bytes of 55
These fields allow you to specify which hex byte to send as the seizure byte, and the number of seizure bytes to send. The seizure byte should be either 55 or AA, which has an alternating binary 1 and 0 pattern. The default is 36 bytes of 55. This field should be 00 when sending off-hook CLASS.
4.2.4 Number of Mark Bytes of FF
This field allows you to change the idle space sent after the seizure bytes. The default is 22 (decimal) bytes of FF hex (22 is the Bellcore specification for POTS phones). You may enter any number from 00 - 99 for some user specific applications. If 00 is entered, idle time will not be present. 10 should be used for off-hook CLASS.
4.2.5 Number of Stop Bits
This field allows you to increase or decrease the number of stop bits sent after each byte of ASCII data. The Bellcore CLASS specification defines that not more than 10 bits of idle time should be present before the next start bit. You can change this field from 00 to 99 decimal. The default is 02.
4.2.6 Main Message Type Number
This field allows you to define the main message type for Multiple Message format data. The default is 80 hex. The message type will be used for ‘F4 - Multiple Message’ and ignored for ‘F4 - Single Message’.
4.2.7 Time to Wait After Ringing
This field specifies the time to wait between the end of the power ringing burst and the start of CLASS signaling. The value is specified in milliseconds divided by 100. The range is 1 to 15 decimal and represents 100 to 1500 milliseconds respectively. This field is ignored for ‘F5 - Send CLASS by Itself’ and 'F5 - Send off-hook CLASS'.
4.2.8 Off-Hook Ack DTMF
When CLASS is sent to an off-hook phone, the CO transmits an alert signal (CAS) to the phone. If the signal has been received correctly, the phone will send an acknowledge signal to back to the CO. The Ack signal is a DTMF digit that must be specified in this field. For example, the Vista 350 returns a DTMF ‘D’, and the Vista 250 returns a DTMF ‘A’. Valid characters are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,*, #, A, B, C, and D.
4.2.9 Multiple or Single Message Type
The F4 function key toggles between the Multiple and Single Message formats of compiling CLASS data. The multiple message format allows several messages to be specified separately, then packetized together under a multiple message type specifier. The single format only uses one message type specifier. All pertinent data for the Single Message format must be specified on the first line of the ‘Message Type / ASCII Data’ edit block. The last five lines are ignored in Single Message mode.
4.2.10 When to Send CLASS
The F5 function key toggles among four options that allow you to specify when the CLASS is to be sent. They are: · Send CLASS after 2 seconds of ringing · Send CLASS after 3 bursts of ringing · Send Off-hook CLASS (Caller ID on Call Waiting, CIDCW) · Send Off-hook CLASS and wait longer (Caller ID on Call Waiting, CIDCW) · Send CLASS by itself (no ringing - for testing message waiting indicators)
If 'Send Off-hook CLASS (CIDCW)' is selected, the phone must be off-hook for more than two seconds before sending the CLASS. When the software is running you will be prompted to go off-hook and it will wait two seconds before sending the CIDCW. The longer wait option waits for 2 more seconds before and 2 seconds after the the CLASS is sent. This is for testing phones and adjunct sets which need the delay (Nortel Prevue unit).
4.2.11 Ringing Frequency and Level
These two fields specify the ringing frequency and ringing level to be used during CLASS testing. The ringing frequency can be defined as either 20 or 30 Hz. The ringing level is specified as a percentage and defaults to 100% (100% equates to a level of 100 Vrms for 20 Hz.).
4.2.12 Message Type and ASCII Data
For a single message, the Message type is a hex byte that identifies the ‘ASCII Data’ to follow, such as Caller ID, name, Message Waiting indicator status, etc. A list of single message types and their respective meaning and format is given next.
Single Message Type Description
04 Calling Number Delivery (format: date time number) e.g. MMDDhhmm5066351055 06 Message Waiting Indicator e.g. ooo = Turn Indicator Off, BBB = On 07 Message Desk Indicator
The Multiple Message format allows the phone to simultaneously support more than one feature. For multiple messages, the Message Type is part of the header, and identifies which feature will be used by the message which follows. The Parameter Type is sent to identify each subsection of the multiple message. For example, the Multiple Message Type may identify that a call is coming to the phone. The message parameters will identify the calling number, the calling name, and the date and time.
Multiple Message Type Description
80 Call Setup (most common) 81 Test for Calling Number 82 Message Waiting
Parameter Type Description
01 Date and Time (8 numerals) e.g. MMDDhhmm (date time) 02 Calling Line ID (not dialable) e.g. 5066351055 03 Dialable Number e.g. 5066351055 04 Reason for Absence of Dialable Number e.g. P = Private Caller, and O = Unknown 05 Reason for Redirection 06 Call Qualifier e.g. L = Long Distance 07 Name e.g. DIGITAL PRODUCT (Maximum of 15 characters) 0B (use with Mult Msg Type 82) VMWI on or off. \00 = off, \FF = on. (Use \ to specify literal hex characters.)
(F2) Save Data and Exit This function key is used to exit the screen and save any changes temporarily. The data is saved to disk if the Configuration Files-Write Defaults option is executed. If the data compiles to more than 2040 bits, a warning will be displayed, and you should change the configuration so the data will not be truncated. The ESC key will exit the screen without saving any changes.
(F3) View Compiled Data This function key will compile the data portion of the CLASS message and display it on the screen. If the first two bytes of a multiple message are 801D, then the multiple message type is 80, and there are 1D hex bytes of data. The checksum byte is the last byte shown.
(F9) Send CLASS This function key is used to compile the CLASS data and send it to the phone as it appears on the CLASS Signaling screen.
4.3 DC Current Test
This option measures the DC current of the phone in both its off- and on-hook states. In the off-hook state, it is measured for all four loop lengths. In the on-hook state the loop length is specified by pressing F2 - Edit Defaults. F4 will toggle the loop length. You may also specify the minimum and maximum currents for each loop length in the Edit Defaults screen.
You must press the SPACEBAR to begin measuring the currents. ESC returns you to the previous menu. ‘C’ clears the measured values. The results are displayed on the screen in tabular form with pass and fail annotations. 4.4 Extension In Use
Pressing ‘E’ from the Interactive Menu will toggle the extension set load inside the unit. If the Extension in Use (EIU) is active, the line is in its off-hook state and the text 'Extension in Use: Enabled’ is displayed. When the EIU is on, the EIU LED on the set should light regardless of its hook state.
The Auto Mode, or other modes that require hook status to change, should not be entered before disabling the EIU. Some phones that have EIU circuitry will respond to a sudden increase in loop length (short to long when taken off-hook) and will show that an EIU was detected.
4.5 High Voltage Lamp Test
Tests high voltage message waiting indicator lamps such as those found on Unity sets. This test may be performed in short or very long loop lengths. If any other loop length is active upon entering t his test, the software will default to short loop. Select one of:
1. 100 Vdc 2. 120 Vdc 3. 100 Vdc, Reverse Polarity 4. 120 Vdc, Reverse Polarity 5. Disable High Voltage 6. Toggle Loop
High voltage will be applied to the jacks when you select one of options 1-4, and the message “CAUTION HIGH VOLTAGE AT JACK" appears on the screen highlighted in red. The lamp should be off when 100 Vdc is applied and be on when 120 Vdc is applied. The ‘HV’ LED will be on while either voltage is present on the POTS jack. 4.6 Loop Length & Hook Time
This is a configuration screen only which allows you to change the attenuation corresponding to each loop length. The defaults are as follows:
Short loop: 100 % (no attenuation), Medium loop: 32 % (10 dB attenuation), Long loop: 10 % (20 dB attenuation). Very Long loop: 10 % (20 dB attenuation).
The AC percentage is the voltage ratio corresponding to the level of attenuation for each loop length. Both receive and transmit values are specified, with transmit being defined as the direction from the TTS unit to the phone. The voltage ratio may be converted to attenuation using the formula:
Attenuation = 20 Log ( percentage / 100 ) = 20 Log (10 / 100) = 20 dB.
The minimum and maximum link and release times are also specified in this screen. Enter values between 0 and 999 for link and 1000 to 8100 for release.
4.7 Memory Dialing & Redial
This option measures DTMF on times and interdigit times. It also indicates pauses and calculates the number of digits per second received.
The screen will display the DTMF digits as well as their timing information. Pauses are long delay times between two successive DTMF digits and are displayed as ‘PSE’ in the off time field. You may specify pauses in the dialing sequence by editing the defaults.
Note: Some sets do not redial well on the very long loop setting.
On-hook states, or when DTMF character state does not change within 1.5 seconds, signifies a break in the digit sequence. The break in sequence causes the average Tones Per Second (TPS) parameters to be updated on the screen. You must use ‘C’ to clear the results before restarting the test.
Pass/Fail criteria can be specified by pressing F2. You will be provided with the following options:
1. DTMF On Time Minimum (0 - 508 ms) :52 2. DTMF On Time Maximum (2 - 510 ms) :180 3. DTMF Off Time Minimum (0 - 506 ms) :52 4. DTMF Off Time Maximum (2 - 508 ms) :180 5. Tones Per Second (TPS) Minimum (0-17) :3.0 6. Tones Per Second (TPS) Maximum (1-18) :9.0 7. Pause Time Minimum (4 - 508 ms) :400 8. Pause Time Maximum (1000 – 9999 ms) :1500 4.8 Ring Test
This test allows you to define a ringing sequence for the set. The screen will appear as follows:
F2 allows you to save the configurations as the defaults for the Ring Phone test. Defaults are ringing level 100%, and ringing frequency 20 Hz.
A warning message will be displayed if one of the A-Leads is shorted to the ring.
4.9 Dial Tone Test
This option allows you to enable CO tones on the POTS line. The options are as follows:
1. Dial Tone 2. Stutter to Dial Tone 3. Ring Back Tone 4. Busy Tone 5. 1 kHz Tone 6. Short Loop 7. Medium Loop 8. Long Loop 9. V Long Loop (Very Long)
While the test is running, the CO tone and loop length will be displayed on the screen. There are no configurable parameters for this test. Remember that F5 allows you to change the external speaker volume. 4.10 Pulse Dial Test
When this test is selected you are prompted to dial a digit. Once you have entered the digit, the percent break and pulsing speed are calculated and displayed. If a ‘1’ is dialed, only the digit dialed is displayed as only one break occurred and the percent break ratio is undefined.
F2 is used to configure the Pass/Fail criteria. The following are the defaults for the time pulse dial option:
4.11 Transmit Level Test
This option will display the audio level transmitted by the phone in a VU meter style horizontal bar graph. The bar graph is annotated in dBm units with 0 dBm corresponding to a voltage of 0.775 Vrms across a 600W termination.
4.12 Configuration Files
This option allows you to configure the settings for the POTS Interactive Mode test programs. Once selected, a menu with the following options will be displayed:
1. Write the current configuration to a file 2. Retrieve a configuration file
Option 1 will prompt you to select a filename in which to save the configurations currently set up in the test options. A file name may contain up to eight characters. Do not include a period or extension. The software will automatically add the extension .pcg to all files. The file used upon execution of the software is called <defaults.pcg>. The software will search for this file every time it is executed from DOS. You may overwrite the defaults file if you wish to have the software boot up with your own other parameters. To execute a different configuration file you must select option 2.
Retrieve a configuration file will prompt you to select a filename from the pick list. The configuration file is read and the test parameters are set according to the retrieved information. You will then be returned to the Interactive Menu and the parameters defined by this file will become the operating parameters for all tests conducted from the Interactive Menu.
Note: Any changes made in the interactive defaults and ‘saved’ using F2 are made permanent only if they are written to a file using this option.
4.13 Send Wink
A wink will temporarily remove the battery feed from the phone by disconnecting and then reconnecting the line. This test may be useful in testing sets that sense the CO wink and go on-hook in response to it. You can set the length of the wink by pressing numbers 0 through 9 for winks of 330 ms through 825 ms.
4.14 + / - Polarity Selection
This option allows you to reverse the polarity of the center two conductors to the phone. The ‘+’ and ‘-’ keys allow you to select normal and reversed polarity modes. (During polarity reversals the voltage is removed for 0.25 seconds.)
4.15 Supervisor Mode
The Supervisor Mode is used to set up a series of test routines relevant to a particular phone type. These are the test routines used in the Auto Mode. You can define which tests to perform and the testing parameters.
When this option is selected, a screen appears prompting you for a password. If you enter an incorrect password you will be returned to the Interactive Menu. Once the correct password is entered, the Supervisor Menu will appear. You may also change the password from this option.
The default password is TTS100. If the file <password.dat> is missing or corrupt the Supervisor Mode can not be entered. <password.dat> is an encrypted file and you will have to re-copy it from the TTS100 disk.
4.15.1 Add a Phone
This option allows you to write separate configuration files for different types of phones. These files will be used when testing phones in the Auto Mode. When this option is selected you will be asked a filename in which to save the test parameters of the phone. A maximum of 8 characters is allowed. Do not enter the extension, the TTS software will add the extension .pts for you. Next, you will be asked for a description of the phone. This is the name of the phone as you would like it to appear on the screen (500, UnityII, Harmony, Vista 250).
After you have entered the name of the phone you must select which tests are applicable for that phone type. A list of available tests will be displayed, each one having a corresponding number. The numbers define the order in which the tests will be performed. You may alter these numbers as you please. If you do not wish to do a particular test enter a 0 . You may scroll up and down the screen with the cursor direction keys. Press the F2 key to save the information and exit the screen. If you do not wish to save the information press ESC. Each test is described in detail in the following sections. Tests may be enabled in this option, h owever, the parameters for these tests must be edited in the Configure a Phone option from the Supervisor Mode menu. If the configurations are not changed in the Configure a Phone option, the test parameters will be set to the manufacturer defaults.
4.15.1.1 Voltage Probe Test
This test is used to determine if the tip or ring of the set’s cord is shorted to the metal base of the telephone. When this test is executed you will be prompted to touch the base of the set with the voltage probe. If voltage is detected the message ‘Probe Voltage Detected!’ will be displayed on the screen. The message will be erased when the probe is removed. Press the SPACEBAR or X to continue.
There are no configurable parameters for this test. The DC loop length is long and the set should be off-hook during this test.
4.15.1.2 Hook Switch Tests
This test allows you to test the hook-switch of the set for switch bounce, It will prompt you to ‘Please depress and hold the hook switch.’ When the hook switch is pressed, the TTS-100 will watch f or switch bounce. If present, it will be reported and the test will be labeled as ‘Failed’. If switch bounce is not detected it will be labeled as ‘Passed’.
Next, you will be prompted to ‘Please release the hook switch’. If switch bounce is reported when the hook switch released, the test will be labeled as ‘Failed’. If switch bounce is not reported the test will be labeled as ‘Passed’.
Switch bounce shorter than 10 ms will not be reported.
This option also allows you to test the ‘A-Leads’ of PBX compatible sets. It ensures that the A-Leads open and close as the hook-switch is pressed and released. The A-Leads are present on the second pair of wires in the RJ-11 plug and should be closed (shorted) when the phone is off-hook and open when the phone is on-hook. Sets requiring the A-Leads test must have a 4 wire line cord or the A-Leads will always measure open. (500 and similar Northern Telecom sets always short the A-Leads.)
The A-Leads test must be enabled in the Configure a Phone option.
4.15.1.3 Link Key Test
This test allows you to test the Link key for valid on-hook time. The software prompts you to press the Link key of the set. The TTS will measure and record the on-hook time of the key. If it is within the allowable range, the next test is automatically started. If the Link key time fails you will be provided with a visual indication of the time measured, and the ‘failed’ status.
The maximum and minimum Link key times may range from 0 - 998 ms.
Link Timing Minimum (0 - 998 ms.): 400 ms Link Timing Maximum (0 - 998 ms.): 675 ms
4.15.1.4 Release Key Test
This test is used to test the timing of the set’s Release key. If the release time passes, the next test is automatically started. If it fails, the timing information will be displayed along with the failure status.
The following parameters may be defined in the Configure a Phone option:
Release Timing Minimum (1000 - 8100 ms): 1760 Release Timing Maximum (1000 - 8100 ms): 2750
4.15.1.5 DC Current Test
This test is used to measure the DC current drawn by the set on various loop lengths. The set should be off-hook upon entry to this test. The DC currents for all 4 loop lengths are measured and displayed. Their Pass/Fail status and min/max permissible off-hook currents are also displayed.
You will then be prompted to place the set on-hook. The short loop DC current is measured and displayed with its status (Pass/Fail) and its configured maximum limit. The polarity is reversed and the on-hook current is measured again. Before exiting the test normal polarity is restored. Press SPACEBAR to exit this test.
The test parameters are listed below with their factory defaults. You may edit them as you please. Loop current specifications are to be between 16 and 130 mA. On-hook Current max. specification range is 0 to 9.9 mA.
4.15.1.6 Handset Noise Test
This test is used to test the handset for noise. The transmit level is displayed in a VU meter style bar graph.
1. Do the wiggle test (check the handset for bad cords). 2. Perform the blow test to check for sidetone. 3. Check the ear piece for silence.
In the configurations for this test you may select whether or not to include the CO/PBX text on this test screen. The CO/PBX switch is included on some Unity type sets and disables loop length sensing for internal gain adjustment. You may also adjust the speaker volume from the Configure a Phone option.
4.15.1.7 High Voltage Lamp Test
This test is used to check the neon lamp message waiting indicator for correct turn on voltage. It should not turn on when 100 Vdc is applied, but should turn on when 120 Vdc is applied. The polarity of the voltage should not affect the lamp. You will be prompted that 100 Vdc is being applied and you will be requested to ensure that the lamp is off. Press SPACEBAR if the lamp is off, or X to indicate it is on.
The next prompt states that 120 Vdc is being applied to the set and the lamp should be on. Press SPACEBAR to pass this test or X to fail it. The polarity of the 120 Vdc is then reversed and the lamp should turn on.
The test may be performed in short and/or Very Long loop. In the Configure a Phone option enter ‘Y’ to enable a loop length or ‘N’ to disable it.
The set should remain on-hook for the duration of this test. If the set is taken off-hook the message ‘Set is Off-hook! High Voltage Disabled!’ is displayed. When the set is placed on-hook the test will be restarted. If SPACEBAR is pressed Pass status will be assigned to the test. If X is pressed Fail status will be assigned to the test. 4.15.1.8 Ring Tests #1
This option allows you to test the ringer on the set. The Pass/Fail criteria will be displayed on the screen during the ringing test. If continuous mode is selected the SPACEBAR or X must be pressed to go to the next test. If the ringer is not in the continuous mode the off-hook state will also exit this test with a Pass and go to the next test.
The following are the default parameters:
The ringing level ranges from 1-100%, and is directly proportional to a voltage level of 1-100 Vrms. 86 Vrms is the typical ringing voltage. The phone should be tested above and below this level.
4.15.1.9 Ring Test # 2
This test is identical to the previous test except that the configurations may be different.
This test allows you to test the set’s display and CLASS receiver. The settings of the test parameters will be displayed on the screen during the CLASS test. Taking the phone off-hook will exit this test with a Pass.
You may edit the parameters for CLASS tests 1, 2 and 3 from the Configure a Phone option. You may also add comment lines to appear on the the screen during the Auto Mode test by selecting option 4. These comments will tell the operator what to expect to see on the display during each test.
The defaults for CLASS test #1 are shown below.
When this test is run in the Auto Mode, the CLASS Test #1 screen should appear as follows:
When F5 is set to ‘Send off-hook CLASS (CIDCW)’ you will be prompted to go off-hook. Space or X must be pressed when the set's Ack status is shown.
4.15.1.11 CLASS Test # 2
This test is identical to the CLASS Test #1 except the configuration may be different to allow you to test the display under different operating conditions. The Auto Mode screen for CLASS test #2 should appear as follows:
4.15.1.12 CLASS Test # 3
This test is identical to the previous two tests except the configuration may be different. Refer to CLASS Test #1 for test details.
4.15.1.13 Touch Tone Test #1
The Touch Tone tests #1 and #2 are used to test the accuracy and level of the set’s DTMF generator. The screen displays the set parameters and prompts you to dial the defined sequence. The digits will be displayed as they are received. If an incorrect digit is received the test may be restarted by the SPACEBAR. The X key will abort the test and go to the next one in the Auto Mode sequence. The defaults for Touch Tone Test #1 are:
AC Receive Percentage (1-100%): 100% DC Loop Length (Short/Medium/Long/ V Long): Short Polarity (Normal/Reversed): Normal Required Tone Sequence (24 digits max): 123456789*0#
4.15.1.14 Touch Tone Test # 2
AC Receive Percentage (1-100%): 10% DC Loop Length (Short/Medium/Long/V Long): Long Polarity (Normal/Reversed): Reversed Required Tone Sequence (24 digits max): 123456789*0# 4.15.1.15 Redial Test
This test measures the DTMF on times and interdigit times for the redial key. It will prompt you to go on-hook for two seconds and then to press the redial key. The digits will be displayed as they are received. If the test fails you may press function key F10 to see the timing information.
Some redial sequences may require a pause in the dialing sequence. Pauses are long delay times between two successive DTMF digits and will be displayed as ‘PSE’ in the interdigit row. The screen will appear the same as the one shown in section 4.7.
On-hook states, or when DTMF character state does not change within 1.5 seconds, signifies a break in the digit sequence. The break in sequence causes the average Tones Per Second (TPS) parameters to be updated on the screen. Press ‘C’ to clear the screen before restarting the test.
Note: Some sets do not redial well on the very long loop setting.
The following parameters may be configured for the Redial Test:
4.15.1.16 Programming Screen #1
This screen is intended to prompt you to clear the set’s memory before starting to test and program it. Fifteen lines of text are available. The following text is the default.
Clear Memory Screen
To clear the set’s memory: Press the OPTIONS, HOLD then # key in order.
After 7 seconds the set should display... Memory Test: PASS After another 5 seconds... Jan 1 1:01a
The display should be dim. Check the LCD contrast control.
4.15.1.17 Programming Screen #2
This screen is intended to prompt you to test the set’s programming keys. Fifteen lines of text are available. The following text is the default:
Key Test
To test the set’s keys check the display as you press the following keys:
Press Message Callers No callers Save No Number Dial, Recall, ¬ Press memory key All memory keys No Number 4.15.1.18 Programming Screen #3
This screen is intended to prompt you to program the FIU indicator. Fifteen lines of text are available. The following is the default:
Programming the FIU Indicator
To program the FIU indicator go off-hook, then press the following keys:
SAVE, Dial pad 1, Memory key 1, SAVE SAVE, Dial pad 0, Memory key 2, SAVE
With the set off-hook pressing memory key 1 should cause the FIU LED to go on. Pressing memory key 2 should cause the FIU LED to go off.
4.15.1.19 Programming Screen #4
This screen is intended to perform a user defined function. Defaults are shown below and prompt you to program the *66 and *69 features on memory keys 1 & 2.
Program *66 and *69 Features
Press SAVE, Memory key 1, *66, SAVE Press SAVE, Memory key 2, *69, SAVE
Verify by pressing memory keys and checking the display. Check the battery on sets over two years old.
4.15.1.20 Programming Screen #5
This screen is intended to prompt you to program a sequence of numbers into the set’s memory. It prompts you to test the interdigit, digit duration, and digits per second parameters of the repertoire memory function of the set. You will be prompted to program the sequence 123456789*0# into memory 3.
Program Repertoire Memory 3 Press SAVE, Memory key 1, 123456789*0#, SAVE
4.15.1.21 Memory Dialing
This test prompts you to press the memory key to test the repertoire function of the dialer. The digits will be displayed as they are received. It also indicates pauses. If the test fails you may press function key F10 to see the timing information. Version 2.2 has a Maximum Pause time field. Minimum = 180-510 ms and Max = 1000-9999 ms.
The following parameters may be configured for the Memory Test:
4.15.1.22 Programming Screen # 6
This screen will prompt you to clear the set’s memory after testing the memory functions. Fifteen lines of text can be edited in the Configure a Phone option. The defaults are as follows:
Clear Memory Screen
To clear the set’s memory: Press the OPTIONS, HOLD then # key in order.
After 7 seconds the set should display... Memory Test: PASS After another 5 seconds... Jan 1 1:01a
The display should be dim. Check the LCD contrast control. 4.15.1.23 Pulse Dial Test
This test measures the timing sequence of pulse dial sets. You will be prompted to go off-hook and dial the required digits. The percent break and pulsing speed are displayed for each digit dialed along with their respective Pass/Fail status.
The following are the Auto Mode defaults for the pulse dial option. The Interactive Mode defaults are the same except that they do not allow you to specify the number of digits required, the Loop Length, or the s peaker volume.
4.15.1.24 Extension In Use Test
This test allows you to test the Extension in Use (EIU) indicator and its associated circuitry. You will be asked to confirm that the EIU indicator turns on and then off in up to four different line conditions. Note that some phones have EIU circuitry that may respond to a sudden increase in loop length (short to long) and show that an EIU was detected. Be careful when setting up Auto Mode tests that you do not change loop lengths while the set is off-hook.
The options are as follows:
Perform EIU test On-hook (Y/N): Y Perform EIU test Off-hook (Y/N): Y Perform above Short Loop (Y/N): Y F4 - Perform above Long Loop (Y/N): Y (F4 will change loop length)
F4 allows you to select a second loop length to perform the EIU test in. You cannot answer ‘No’ to all 4 options. 4.15.1.25 Dial Tone Test
This test prompts you to listen to dial tone in the receiver and ensure that it sounds clear. The following are the default parameters for this test.
Speaker Volume: 0 AC Dial Tone Level: 100% DC Loop Length: Short Prompt Texts (4 lines): Ensure the dial tone sounds clear. Check the receiver’s volume control.
4.15.1.26 Hold Key/LED Test
This test allows you to test the Hold key function of the set. The hold test may be configured to be performed in two loop lengths, one of which is always short loop. 15 lines of text may be edited. The default parameters are shown below.
4.15.1.27 Transmit Test
This test provides a visual indication of the set’s transmission level. It displays a VU meter style bar graph on the screen representing the set’s output. DTMF level may also be seen on the VU indicator. The privacy key should mute the handset.
The transmit test can be configured to be performed in two different loop lengths. The following are the defaults for the Transmit test:
Test Short Loop Transmit (Y/N): Y F4 - Test Long Loop Transmit (Y/N): Y AC Level Short Loop (1-100%): 100% AC Level Long Loop (1-100%): 100% ( F4 will change loop) Speaker Volume: 0
Include text ‘Privacy key should mute the handset’ (Y/N): N
The long loop level should be the same as short loop to allow for level comparison. Normally long loop transmission is boosted by approximately 6 dB wrt short loop by the set.
4.15.1.28 AC Power Failure Test
This test is used to test AC line powered sets. These sets are expected to work as ‘no frills’ phones if the AC line power is removed. Hook switch and DTMF status indicators are included.
The loop length may be configured for any of the four loop lengths. The default loop length is long. Eleven lines of text are editable.
4.15.2 Configure a Phone
The Configure a Phone option gives you the ability to define Pass/Fail criteria for the set of tests defined for a specific phone. These tests are saved as a configuration file to be used in the Auto Mode.
When this option is selected a box will appear with a list of phone descriptions. To select a phone, scroll up or down the list until the phone you wish to select is highlighted and press ENTER. If you have a mouse simply click on the phone you wish to select with the left button.
After editing the configurations, press ESC to return to the Configure a Phone menu.
All valid edit keys are listed in the help screen.
4.15.2.1 Pauses After Tests
You may pause after some of the tests in the Auto Mode if desired. This will allow the Pass/Fail status for the test to be reported and seen before continuing to the next test.
4.15.2.2 Change Phone Tests
You may change the order in which the Auto Mode tests will be executed in this option. Order the tests as you please by numbering them from 1 to 28. Zero or blank tests are not performed. Use <Ctrl> Y to erase fields from the cursor position. The screen appears the same as the Add a Phone screen shown in section 4.15.1.
4.15.2.3 Save Changes and Exit
Once you have configured the parameters for a phone, select this option to save your changes to a file and exit. ESC will exit this screen without saving the configurations.
4.15.3 Copy a Phone
Allows you to save the configurations for one phone to another file. Once you have selected this option a list of phones will appear on the screen. You will be prompted to type a filename for the destination and a description of the phone. Once the filename has been entered, you will be returned to the Supervisor Menu. 4.15.4 Delete a Phone
Once you have selected this option a list of phones will appear on the screen. Once you have selected a phone you will be asked if it is the phone you wish to delete. Press 'Y' if you want to delete the phone or 'N' if you do not want to delete the phone.
4.15.5 Change Password
When you select this option you will be prompted for a new password. Type in your new password (maximum 10 characters) and press ENTER. You will be prompted to type in your new password again to verify it.If you have entered the same password twice you will have successfully changed your password. If there is a problem with the verification, you will be asked to enter your new password again. Once the passowrd has been accepted, you will be returned to the Supervisor Menu.
The password is stored in an encrypted file called <password.dat>. If this file is accidentally destroyed you must copy it from the master or backup TTS-100 PC software diskette to your working directory. The default password is TTS100.
4.15.6 Daily Statistics
Daily statistics for each phone type are kept on file. To view phone counts for a particular day, enter the date that you wish to view and press ENTER. The phone type and the number tested will be displayed. If there are no entries for that date, the text “Date Not Found!” will be displayed. These files are overwritten every month. If a backup is required the files should be copied to another disk monthly. The date files are saved as <*.pct> for POTS phones and <*.ect> for EBS phones.
Note that if the date on your computer does not change this statistic will be incorrect.
5.0 EBS Mode
The EBS line will allow you to connect a maximum of one primary set, one 18 button add-on, and one 36 button add-on. The EBS line will acknowledge four addresses (0 - 3). A primary set will always report to address 0. An 18 button add-on will occupy address 1. A 36 button add-on appears to be two eighteen button add-ons and occupies addresses 2 and 3. Since add-ons are always associated with a primary set, and do not have a 900 W terminating impedance, a primary set (or the internal 900 W termination) must always be present when testing add-on(s). The internal 900 W termination will be enabled or disabled by the TTS when the Reset System command is executed.
Version 2.2 software allows the use of 16 button primary sets with one or two 22 button add-on modules.
The EBS menu provides access to many functions for testing an EBS telephone. In the top right-most corner, a block states the current loop length. You may change this loop length by pressing 1, 2 or 3. Below the loop length, the polarity status is displayed. Polarity will be either ‘Normal’ or ‘Reversed’. An EBS set should only function in Normal polarity mode. Reversed polarity is used when the tip and ring of the sets cord have been reversed. The following options are available from the EBS menu:
F5 is used to set the amplified speaker volume. F1 invokes the help menu.
Tests may be executed individually from the Interactive Menu, by pressing the character corresponding to the desired selection. Once the test has been completed you will be returned to the Interactive Menu. Tests executed from the Interactive Menu are configurable from within the Configure Tests option. All parameters will be set to their default upon start up of the software. You may change the parameters as you execute the tests, or save them to file. The <defaults.ecg> is the start-up file for the Interactive mode.
Tests may also be set up as a user-defined series to be executed in the Auto Mode. The test series, and its configurations, can be established in the Supervisor Mode option.
5.1 Auto Mode
The Auto Mode allows you to run a series of tests that have been previously set up in the Supervisor Mode. The tests will be run one after another and provide a summary report of the Pass/Fail status of each test once all tests have been completed. Each of the available tests will be described in the following section.
During the execution of the various Auto Mode tests the following keys are used:
SPACE Causes the next test to be started. If the previous test was complete it will be labeled as ‘Passed’. If the previous test was incomplete it will be labeled as ‘Failed’
X Causes the test that was just completed to be labeled as ‘failed’.
R Causes the current test to be restarted. It is useful when the handset is not enabled in the transmit tests.
ESC Returns you to the Interactive Menu.
F5 This key is enabled for most options in the EBS menu. It allows changing the amplified speaker volume.
Backspace Backs the program up to the previous test. 5.1.1 Pass/Fail Summary
This screen will be displayed when the last test in the Auto Mode series has been completed. The number of failed tests will be displayed for each phone. Pressing ENTER will restart the tests and increment the phone count. ESC returns you to the Interactive Menu. The following screen is an example of what will be displayed.
5.2 Address/Data Mode
The function of the Address/Data Mode is to allow you to send a hex code command to a particular address and have the set execute that command. This option will give you the choice of one of the following:
SYMBOL 183 \f "Symbol" \s 14 \h Enter codes to the TTS unit and have it execute the codes immediately. SYMBOL 183 \f "Symbol" \s 14 \h Recall a file previously created and send codes to the TTS unit. In turn the TTS-100 will immediately execute the codes contained in the file.
When the Address/Data Mode is selected, a menu will appear containing the following selections:
SYMBOL 183 \f "Symbol" \s 14 \h Manual Entry SYMBOL 183 \f "Symbol" \s 14 \h Auto Execute
The hex code commands are listed in Section 6, and can also be obtained on line by using function keys F3 - F8. 5.2.1 Address/Data Mode - Manual Entry
Accessing this menu option gives you the ability to write a hex code command to a particular address location and have this command executed when the final character is pressed. There is no need to press ENTER once the code is entered. The data entry format used is ACC, where A is the address location and CC is the EBS Hex Command Code. For example, the following set of commands will:
1. Enable the display 2. Send the message 'HI' to the bottom row at approximately the center of the display 3. Disable the cursor
Consider the first command 09D. The first character, 0 (Zero), is the address location of the display. Since the display is attached to the primary set, the display is also at address location 0. The next two characters represent the EBS hex command code. 9D is the hex code to ENABLE DISPLAY. Chapter 6 contains tables of the EBS hex codes required to operate the TTS software and unit. The command hex codes are also available from the help bar at the top of the screen. By pressing the appropriate function key, a window will appear displaying the available codes that can be sent from the CO to the phone set.
Press ESC to quit this option and return to the Address/Data mode menu. 5.2.2 Address/Data Mode - Auto Execute
This menu option gives you the ability to retrieve a test routine file and automatically run it multiple times. The file is a text file created in the Configure Tests Interactive Menu option.
When the file is selected you will be asked how many times you wish to execute it. You may run it as many times as you wish. (99 will run the sequence continuously until ESC is pressed.) Once the entire routine is finished you will be asked if you wish to execute another file. If you answer yes, you will be returned to the file selection box, otherwise the Address/Data menu will be displayed.
5.2.3 Address/Data Mode - Create a File
You may create a new file or edit an existing one in the Configure Tests Option. If you choose to create a new file you can enter up to 99 codes. When you have completed your test routine, press F2 to save your configurations. You will be prompted for a filename to save your file. A maximum of eight characters are allowed. Do not include an extension, the TTS software will add the extension <.tst> for you. If a longer file is needed you may create it with a text editor with one code per line. Name it using <.tst> as the file extension.
5.3 Display Test
Display Test will send a preprogrammed message to the display. The default message is:
DIGITAL PRODUCTS LIMITED TELEPHONE TEST SYSTEM
The text may be altered from the Interactive Menu in the Configure Tests option. The text is sent to the display in two lines, with up to 50 characters per line. You may configure the length of the lines by pressing F4 and entering any number between 1 and 50.
This test may also be configured for the Auto Mode tests. The Auto Mode performs Display Tests #1 and #2. Each test can send different text to the display at different loop lengths. 5.4 DC Current & Ack Timing
This option allows you to test the set’s EBS transmit level, Ack signal to a CO code, and DC current draw. This test will be performed for short, medium, and long loop lengths.
The acceptable max/min parameters for this test can be established in the Configure Tests menu option.
The EBS level is the level at which the set is transmitting its acknowledge signal to the CO. EBS transmit levels are measured at the set and should not change with a change in loop length.
Default levels have been set in accordance with Northern Telecom specifications. A primary set will transmit between 1.1 to 1.5 Vp-p. If the primary set is not present, the level of the add-on will be measured. Add-on levels may be slightly higher than primary levels. Ensure the ‘Reset System’ option has been run to properly terminate the TTS.
The Ack timing is referenced with t = 0 being the moment that the TTS sent the start bit of an EBS code. A valid Ack will be returned from the phone at approximately t=15.50 ms and will remain on the line for 3.00 ms.
The TTS begins looking for the Ack at t=15.75 ms and will report start time of the ACK detection and ACK duration from this point on. To allow for possible delays on the line, the default settings for this test will validate an Ack that begins at or before t = 16.00 ms and is present for at least 2 ms.
The DC current is measured 0.5 seconds after the EBS code is sent. Both the active and idle currents are displayed for each loop length. Typical values for idle and active modes are 8-10 mA and 16-17 mA, respectively, and should not vary with loop length. The add-on currents should be zero. (Older EBS phones may draw 40 mA or more.)
This option allows real time typing of characters to the EBS display. You will be prompted to enter characters on the keyboard. As you press a key on the keyboard, the display on the phone will simultaneously display the character typed. The display will ‘word wrap’ automatically. To clear the display, press the BACKSPACE key. To quit the menu option and clear the display press the ENTER key. To quit the menu option without clearing the display press the ESC key.
5.6 LCD Indicator Strobe
LCD Indicator Strobe may be configured to perform the following functions:
1. Turn on all LCD indicators on the set(s) that are connected to the TTS unit. When all the LCD indicators are on, the TTS will wait 1 second. 2. The TTS will flash all the LCD indicators. The LCD indicators will flash for 1 second. 3. The TTS will wink all the LCD indicators. The LCD indicators will wink for 1 second and then the LCD indicators will be turned off.
The parameters for this test may be set up from the Interactive menu in the Configure Tests option. The LCD Indicator Strobe configurations will provide you with the following options: ‘ON’, ‘Wink’, ‘Flash’, ‘Off’, and ‘Pause’. Answer ‘Y’ to enable an option, or ‘N’ to disable it. The pause option requires a number between 0 and 9 to set the number of seconds to pause between tests. If all tests are answered ‘N’, only the screen will prompt you that all indicators should be off. This test will be performed for all configured addresses as detected by ‘Reset System’. Version 2.2 has codes added for 16 and 22 button sets.
The Auto Mode test can be set up in the Configure a Phone option in the Supervisor Mode. All non-acknowledged codes will be reported before continuing to the next test. 5.7 Key Test
This menu option allows you to see the codes generated by the EBS set(s) that are connected to the TTS-100. When you press keys on the EBS set(s), the codes will be displayed on the screen. Repeat, Collision and Parity bit abnormalities will be shown at the end of the description line by the R, C, and P letters.
This test can be performed in all four loop lengths. The Auto Mode configurations can be defined in the Supervisor Mode - Configure a Phone option. There are no configurable parameters for this test in the Interactive Mode. Version 2.2 has descriptions added for 16 and 22 button sets.
When this test is executed in the Auto Mode, the screen will prompt you to press various keys on the set. The software will prompt you if an incorrect code is received. If the key continues to fail, press ‘X’ to go to the next test, or ESC to return to the Interactive Menu.
5.8 Reset System
Resets the sets under test and provides a visual display of which addresses are connected to the TTS-100 unit.
The TTS-100 is reset when you enter the EBS Interactive Menu from the opening menu. However, running this test is the only way to be provided with a visual indication of which sets are connected. The TTS will report addresses 0-7, but will only support addresses 0-3. The remaining addresses (4-7) are provided to allow you to ensure that a phone is not reporting on more than one address.
This test should be used every time the phone system under test is changed. The state of the 900 W termination can only be changed from this test option.
There are no configurable parameters for this test when run in the Interactive Mode. When this test is executed in the Auto Mode it will run the Reset System test and a Loop Back test. In the Loop Back test, the TTS will send hex commands to the phone and the phone will echo them back. This is used to ensure that the set is receiving and transmitting properly. The Loop Back test must be configured in the Configure a Phone option from the Supervisor Mode menu. The screen will appear as follows:
The first two items on this screen define the Reset System configurations. The power up pause is measured from the time that the Reset occurred, and is defined as the maximum time allotted by the TTS for the set to power-up properly. The power up pause may be configured from 1-99 seconds.
The remaining parameters pertain to the Loop Back test. The Loop back test is performed in two loop lengths on every pass. The Display test will send characters to the display and provide a visual indication of the status of every character on the display.
Status Bytes are hex codes normally sent from the phone to the CO, and are used by the CO to identify that there is a working display connected to the set. The CO will send the phone a Transmit Display Status code. In response to the CO request, the first byte sent by the phone will be hex code 34. The Status byte will be sent 12 times for every pass of the Loop Back test. Every byte sent from the phone for the next 11 passes will be hex code 30. The LCD test will power every LCD on a primary or add-on one at a time.
The number of passes defines the number of times that the TTS should execute the Loop Back test. If set to 0, the Loop Back test will not be performed.
The Reset System will only be performed once, and will not be repeated for every pass of the Loop Back test.
Version 2.2 has codes added for 16 and 22 button sets and may be enabled by a Y in the Test 12-14/19-22 LCDs for add 0/1-2 option. Version 2.2 also allows multiple addresses to be loop back tested at once. Enter all desired addresses in the address field.
In the Auto Mode, if a set does not report that it is connected, the phone cable may be reversed. To check for this fault, press the ‘R’ key to reverse the polarity at the jack and the TTS will again reset the system. If the set reports connected with the polarity reversed, the polarity will remain reversed for the duration of the Auto Mode tests. The polarity will be set to normal at the end of the Auto Mode sequence.
If the Reset System is being executed in the EBS Interactive Mode, the polarity at the jack must be reversed from the Interactive Menu using the +/- keys.
5.9 Send CO Tones
This option allows you to send a CO tone to the Handsfree, Voice, Handset or Alert system. You may choose from one of the following CO tones:
Dial Tone Stutter to Dial Tone Ring Back Tone Busy Tone 1 kHz Tone Alert Tone (EBS Ringing)
The AC levels default to 100% for this test. The default AC levels for short, medium, and long loop length may be set up in the Configure Tests option from the Interactive Menu.
The Auto Mode will allow you to execute the Alert Test and the Dial Tone Tests. The Dial Tone tests are done for Handset, Handsfree, and Voice. The Handsfree and Handset tests have the same configurations and can be toggled on the set by pressing the Handsfree and release keys. The following parameters may be configured:
AC Rx/Tx Level (1-100): 100% DC Loop Length (S/M/L/N): Short (N - no test desired)
Up to four lines of prompt text are available. You will be prompted to adjust the speaker level for the hands free and voice options and to listen for clear CO tone. 5.10 Transmit Level Test
This option displays the level of the audio transmitted by the phone in a VU meter style bar graph. You may select to test either the handset mic or the hands free mic. The VU meter becomes active once the mic has been selected. If the handset is in the cradle when the handset mic was selected, you will have to restart the test (R) to activate the VU meter.
The AC transmit levels for this test will default to 100%. You may change the levels for short, medium, and long loop from the Configure Tests option in the Interactive menu.
The bar graph is annotated in dBm units with 0 dBm corresponding to a voltage of 0.949 Vrms across a 900 W termination. The maximum level which can be sensed is -2 dBm wrt 900 W.
The Auto Mode will allow you to perform the Transmit Tests for both Handset and Handsfree operation. Press the ‘Handsfree’ keys to enable the handsfree mode. Press the ‘Release’ key to enable the handset. The following parameters are the defaults for the Auto Mode test:
AC Rx/Tx Level (1-100): 100% DC Loop Length (S/M/L): Short Speaker Volume: 5 5.11 User Mode
This menu option allows you to perform any of the following features:
1. Turn on or off any LCD indicator. 2. Enable the Buzzer (and wink key). 3. Make any indicator ring (alert tone and flash key). 4. Make any indicator wink. 5. Make any indicator flash.
These features are enabled with Hex code commands. The data entry format is: AKKC
Where A is the address location of the set you wish to send the command to. KK is the key number to test (01-22). C is the code that tells the key what to do. C can be as follows: O is OFF, N is ON, B is enable buzzer, R is enable ringing, W is WINK, and F is FLASH.
Key number 1 is the bottom-most left key. The keys are counted from bottom to top. The 36 button add-on is numbered key 1-18 for address 2, with key 19 beginning the sequence 1-18 for address 3.
For example, you wish to ring key 10 on a 36 button add-on at address 2. The format will be 210R. The 10th key indicator will flash and you will hear a two second burst of ringing. Note that on long loop the ringing is greatly attenuated in this test. If you wish to turn on the 8th indicator of a primary set, the format will be 008N. The set will display a black diamond on the indicator when the key is on.
5.12 Configuration Files
Upon entering this option the following menu will be displayed:
1. Write the current configuration to a file 2. Retrieve a configuration file
Upon selecting option 1 you are prompted to select a filename in which to save the configuration information. If the file already exists then you will be asked if you wish to overwrite the file.
Retrieve a Configuration File prompts you to select a filename from the pick list. The configuration file selected is read and the program defaults are set according to the file’s saved parameters. Note that the default file is called <defaults.ecg>.
5.13 Configure Tests
This is the menu option described in the above topics in which you may alter the various parameters for tests performed from the EBS Interactive Menu. Once selected, this option will display a menu of the tests that can be configured.
The configurations set up in this option apply only to the Interactive menu. You may write these configurations to a file to be used again. The <defaults.ecg> file contains the configurations used upon start-up of the TTS software. In order to change the power-up defaults you must write your configurations to the <defaults.ecg> file.
Details on these tests have been given in sections 5.1 to 5.12. The Default Loop length is a global parameter affecting all tests in the configuration file and will be discussed next.
The default loop length is defined in this option. The AC transmit and receive levels for each loop length are also specified here. Any changes made to the default loop length and AC levels will not become active until the EBS mode has been exited and re-entered from the Opening Menu.
Default AC levels are as follows:
Short loop: 100% Medium loop: 32% Long loop: 5%
Both receive and transmit values are specified, with transmit being defined as the direction from the TTS unit to the phone. The percentage is the voltage ratio that is allowed to pass. The voltage ratio may be converted to attenuation using the formula:
-20 Log ( percentage / 100 ) = -20 Log (10 / 100) = 20 dB.
In short loop, the distance to the central office is short and the losses in the cable pair are minimal. Therefore, short loop should have no attenuation (100% throughout). Medium loop should have about 10 dB of attenuation, corresponding to a percentage level of 32%.
On long loops, typical attenuation for the voice band is 14 dB. However, the attenuation at 8 kHz may be as high as 24 dB on an EBS line (corresponding to a value of 6%). Therefore, the long loop receive defrault is set to 6%.
The TTS-100 transmits 8 kHz EBS signaling at a level of 1.3 Vp-p at 100%. Northern Telecom specifications state that the set must accept 8 kHz EBS signaling down to a level of 50-55 mVp-p. The default has been set to 5%, corresponding to a level of 65 mVp-p.
5.14 Supervisor Mode
When this option is selected a screen appears prompting you for a password. If you enter an incorrect password you will be returned to the EBS Interactive menu. Once the correct password is entered, the Supervisor Menu will appear. The default password is TTS100. This mode may be entered from the opening menu as well.
5.14.1 Add a Phone
This option allows you to write separate configuration files for different types of phones. Upon execution of this option you will be asked for the filename in which to save the phone configurations. A maximum of 8 characters is allowed. Do not enter the extension, the TTS software will do this for you. Next, you will be asked for a description of the phone. This is the name of the phone as you would like it to appear on the screen (4X36, 18 BUTTON, DISPLAY, etc.).
A list of tests will be displayed and you must select which tests are applicable for that phone type. Enter 'Y' if you wish to include this test or 'N' if you do not want the test included. You may scroll up and down the screen with the cursor direction keys if you wish to change any of the information you have entered.
Press the F2 key to save the information and exit the screen.
Details on these tests have been given in sections 5.1 to 5.12. Two new tests have been added for the Auto Mode options - the Handset Test, and the Buzzer Test.
5.14.1.1 Handset Test
Allows you to test for handset noise and bad cords. The DC loop length will be displayed and you will be prompted to wiggle the cord and listen for noise in the handset. No configurable items are available for this test. 5.14.1.2 Buzzer Test
The Buzzer Test is used to test the internal circuitry of the set’s own CO tone generator. The TTS-100 will send a code to the phone that will engage the buzzer for the set. It also tests the ability of the phone to generate its own Alert tone. The buzzer test should alternate between Buzzer tone and Alert tone every second. This test applies to the Auto Mode only and has the following configurable parameters:
AC Rx/Tx Level (1-100): 100% DC Loop Length (S/M/L/N): Short
Up to four lines of text are available.
5.14.2 Configure a Phone
The Configure a Phone option gives you the ability to define Pass/Fail criteria for the set of tests defined in the Add a Phone section. These tests are saved as a configuration file. The configuration file will be used in the Auto Mode.
Once you have selected a phone, a menu will appear with the following configuration options. After editing the configurations, press F2 to save the changes before returning to this menu.
5.14.2.1 AC Levels
This option is used to specify the AC loop length parameters for the Auto Mode set under test. Six fields are provided. They are receive and transmit specifications for short, medium and long loop lengths. The defaults are set to the following:
Transmit Receive Short Loop 100 100% Medium Loop 32 32% Long Loop 5 5%
5.14.2.2 Change Phone Tests
This option is used to change the phone description text and to enable or disable the various phone tests. It is usually used after copying a phone configuration file to a new name. It allows you to change the test selections and the operating parameters of the tests.
5.14.2.3 Save Changes to File
Once you have made changes, select this option to save your changes to a file and exit. This option will save any edits you have done in any field while in the Configure a Phone option.
5.14.3 Copy a Phone
This option allows you to copy the configurations for a phone to another filename. It is used when a similar phone is to be made from one that has already been configured. Once you have selected this option, a list of phones will appear on the screen. Select the phone you wish to copy. You will be prompted to type a filename for the destination, and a filenam for the description.
New phone configurations are added to the bottom of the pick list. If the list order must be altered you may edit the <ebs.lst> file with a text editor such as DOS v5.0 EDIT.
5.14.4 Delete a Phone
Once you have selected this option a list of phones will appear on the screen. Once you have selected a phone you will be asked to verify that it is the phone you wish to delete. Press 'Y' if you want to delete the phone or 'N' if you do not want to delete the phone.
5.14.5 Daily Statistics
Daily statistics for each phone are kept on file. To view phone counts for a particular day, enter the date (1-31) that you wish to view and press ENTER. All phone types, and the number tested will be displayed. These files will be overwritten every month. If a backup is required, copy all of the <.ect> files. If there are no entries for that date, the message “Date Not Found!” will be displayed.
5.14.6 Change Password
When you select this option you will be prompted for a new password. Type in your new password (maximum 10 characters) and press ENTER. You will be prompted to type in your new password again to verify it. If you have entered the same password twice you will have successfully changed your password. If there is a problem with the verification, you will be asked to enter your new password again.
The password is stored in an encrypted file called <password.dat>. If this file is accidentally destroyed you must copy it from the master software diskette to your working directory. The default password is TTS100.
5.15 + / - Polarity Selection
This option allows you to reverse the polarity of the center two conductors to the phone. The ‘+’ and ‘-’ keys allow you to select normal and reversed polarity modes.
The polarity set by these keys will be observed for all tests executed in the Interactive Mode. The polarity in the Auto Mode must be set from the Reset System test by pressing the ‘R’ key. 6.0 EBS Command Set and Address Configuration
This chapter contains the information and hex codes required to operate the EBS line of the TTS-100. The hex codes listed are the codes sent by the TTS (simulated CO) to the set(s). The codes that are generated by the set are not listed in this chapter. Refer to the Ameritech Publications Document No. AM-TR-NPL-000004 for further information on EBS codes and address configurations.
6.1 Address Configuration
The primary set occupies address location 0.
The 18 and 22 button add-ons have the capability to select their own address. When the TTS is reset with an add-on connected, the add-on selects the lowest address location available. An 18 button add-on can have an address location of 1, 2 or 3 and a 22 button add-on can have address 1 or 2.
The 20 button add-on is user selectable to address 1, 2 or 3 for the primary set or address 5, 6 or 7 for the auxiliary voice terminal. The TTS software cannot fully test a 20 Button Add-on. Note: to test 4X20 sets with add-ons pair 2 must be shorted to pair 3 to allow the set to power up.
The 36 button add-on is essentially two 18 button add-ons. The first 18 keys are always on address 2 and the last 18 keys are on address location 3.
6.2 CO to Primary Set Commands
The following two charts list the command codes sent by the CO to the primary set.
6.3 CO to Display Set Commands
The following is a list of commands that sent by the CO to the display of a primary set.
6.4 ASCII Character Set
The following are the valid ASCII characters that may be sent to the display.
The following chart lists the codes that will be sent to address 1, producing 18 key/LCD pairs for each add-on.
6.6 CO to 20 Button Add-On Commands
The following chart lists the hex codes for the 20 button add-on.
6.7 CO to 36 Button Add-On Commands
6.6 CO to 22 Button Add-On Commands
The following chart lists the hex codes for the 22 button add-on.
7.0 Central Office Emulator
The TTS-100 may be used as a Central Office Emulator. The CO emulator allows you to place a call from the POTS set to the EBS set, or from the EBS set to the POTS set. To run the software enter COEM at the DOS prompt. (You must run the TTS-100 program to change the serial port.)
The CO Emulator has one POTS dialable line and four EBS dialable lines. The four EBS lines are available on feature keys 1 through 4. The phone number and caller ID may be configured for the EBS and POTS lines.
Key 5 on the EBS set is 'date and time'. Upon pressing key 5, the date and time will be displayed on the set for approximately 10 seconds.
Feature key 7 is the 'conference-3' key. You may conference three lines at a time. It can be a conference among three EBS lines, or between two EBS lines and one POTS line. To establish a conference: 1. Call one line from any other. 2. Press the conference key once. 3. At the dial tone, dial the third number to be conferenced. 4. Once the third line has begun to ring you must press the conference key again to establish the three-way conference call. If the conference key is not pressed for the second time, only the calling line and the third line will have a voice path. The other line will remain on hold.
Once a three-way conference has been established any one of the three lines may disconnect leaving a voice path between the other two lines.
Only one conference is allowed. In a conference, or call transfer, you cannot conference or transfer again until all lines have released.
The POTS link button does not perform the same function as the conference key on the EBS set. The link button on a POTS phone allows you to switch the voice path between two incoming lines, however, you cannot conference all three lines together. If you are involved in a three-way conference you cannot link from the POTS phone.
The following parameters can be configured:
1. The EBS set’s number and associated name for lines 1 through 4. 2. The POTS set’s number and associated name.
1. You may draw dial tone by going off-hook, pressing feature key 1-4, or pressing the handsfree key. 2. After dial tone is received, you may dial a seven digit number. 3. If you dial the POTS number, the POTS set will ring and CLASS will be sent. The CLASS will contain the system’s date and time, the EBS number and the EBS name. 4. An active EBS set may be placed on Hold or Released to the idle state. 5. Conference-3 is available on key 7. 6. Date and Time are available on key 5.
The POTS set has the following features:
1. You may draw dial tone by going off-hook. 2. After dial tone is received, you may dial a seven digit number. 3. If you dial the EBS number, the EBS set’s feature key 1 will flash and the set will ring. The EBS display will show the configured POTS line’s name and number on the first line. 4. Link will access a secondary POTS line dial tone. Another number may be dialed at this time. The two can not be conferenced.
Notes: 1. Feature key 12 is supported as ‘handsfree’ on NT4X37 sets. 2. The EBS set may take up to 10 seconds to power up after the software is run. 3. If keys on the EBS set or hook switches are rapidly asserted the software may slow down temporarily.
8.0 Warranty and Technical Support
8.1 Warranty
DPL Telecom Techniques guarantees equipment of its manufacture and each part or component thereof against all defects in material and/or workmanship, and agrees to remedy any such defect at no charge provided that the defective unit is returned, transportation prepaid, to the DPL Telecom Techniques factory from which shipment was made. This warranty extends for a period of one (1) year from the date of purchase. In no event will DPL Telecom Techniques be liable for any incidental or consequential damages.
This warranty does not extend to products which have been altered by other than authorized DPL Telecom Techniques personnel.
A RETURN AUTHORIZATION NUMBER must be obtained from your distributor or DPL Telecom Techniques before shipping and be displayed clearly on the shipping label.
8.2 Technical Support
For technical support, call DPL Group 37 Hanover St Saint John, NB E2L 3G1 506 847-0128
DPL Group Support is between the hours of 7:30 am and 3:30 pm EST.
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