The DCR-112 is a card rack designed to house DPL Telecom Techniques cards. It consists of thirteen card slots and provides connections for the power supply, serial communications, telephone lines and Dialogic AEB cards.

The CRH-200 is the host card for the DCR-112. It provides an interface between the controlling computer and the twelve application or line cards. Also, the CRH-200 has permanent memory which can be used to store configuration data.

The CPI-201 line card interfaces a Northern Telecom DMS-100 Centrex MDC telephone line to a

computer system. It allows complete computer control of an MDC line. The computer can originate and answer telephone calls using the CPI-201.

The CPI-201 is a single card. It must be placed in one of the twelve available slots in a DPL Telecom Techniques Card Rack (DCR-112). The card rack must also be equipped with a Host Card (CRH-200). The Card Rack system allows the user to purchase only as many line cards as needed and expand as the need arises (up to twelve line cards per rack). This manual uses the term CPI-201 and line card interchangeably.

(Picture CPI-201 Card)

Key Benefits

Centrex Line Monitoring
Information Logging
Data Viewing
Error Logging
911 Calling Logging

By using a single serial port, the CPI-201 allows a computer to:

1. Validate incoming caller ID (CLID)

2. Answer calls

3. Transmit precise dial tone

4. Receive Touch Tone digits (DTMF)

5. Transfer/conference a call

6. Monitor feature key status

7. Simulate the pressing of any P-Phone key

The line card has an energy detector that enables the computer to determine which of the call progress tones is present on the line.

Provisions are made for connecting the line card to computer controlled voice cards via Dialogic's AEB Bus.

Equipment Required

A computer of any type that has a 9 pin RS232C communications port capable of communicating at 9600 baud.
Software to control the CPI-201 through the communications port. Any communication package should be sufficient for preliminary testing of the CPI-201.
EBS/Centrex line (Meridian Digital Centrex line). A typical line configuration to allow the CPI-201 to read incoming CLID and perform call transfers is to have an incoming number on key 1, the display enabled, and 3-way call conference on a feature key.

DCR-112 Card Rack Specifications

Power Input: 5 V, +/-12 V, current as required

Weight: 4.8 kg (10.6 lb)

Length: 38 cm (15")

Width: 29.5 cm (11.6")

Height: 12.7 cm (5")

Case: Zinc Chromate plated steel, painted almond. Maximum Altitude: 2000 m

Operating Temp.: 10º C to 40º C (50º F to 104º F)

Current: drawn from DCR - 112 power supply, 45 mA @ 5 V

Connectors available:

Power Supply Connector: Stereo 5 pin DIN jack

Serial Data Connector: Male DB9 jack

Communication Port Connector 1: 50 pin miniature ribbon plug

Communication Port Connector 2: 50 pin miniature ribbon plug when AEB port is installed.

Stereo Jack: 1/8" stereo jack

Sixteen LEDs are located on the DCR-112 case. One LED shows power has been applied to the unit. One LED shows status of the host card. Two LEDs show serial data receive and transmit status. Twelve LEDs indicate the status of the installed line cards.

Fuses

A fuse, F1, of type "Buss" "MDL-2" is on the DCR-112 board at the top of the host card slot. This fuse is intended to minimize damage caused by powering the DCR-112 with the old type of adapter (16 VAC output). This fuse is a slow blow type fuse.

Two other fuses, F2 and F3, of type "Buss" “MDL-1/2” are on the DCR-112 board as well. They protect from over currents in the +/- 12 Vdc supplies. These fuses are slow blow type fuses.

Interface Cards

CRH-200 Technical Specifications

Size: 23.8 cm X 9.9 cm (8.1" X 3.9")

Weight: 0.13 kg (0.29 lb)

Current Drawn from DCR-112 power supply:

60.0 mA @ +5 V

4.0 mA @ +12 V

18.0 mA @ -12 V

CPI-201 Technical Specifications

Physical and Current Specifications

Weight: 0.12 kg (0.26 lb)

Size: 20.6 cm X 9.1 cm (8.1" X 3.9")

Current drawn from DCR-112 power supply:

30.0 mA @ +5 V

9.0 mA @ +12 V

30.0 mA @ -12 V

EBS Signaling Channel

8 kHz +/- 1.5% ASK into 900 ohm, 1 kbits/s

Transmit: 1.3 Vp-p +/-0.2 Vp-p into 900 ohm.

Receive: 1.3 Vp-p - 50 mVp-p. Range: 7.1-9.0 kHz

Loop attenuation at 8 kHz from line card to CPI-201: 21dB maximum

Line impedance: 900 ohm +/- 10%

DC Current drawn by the CPI-201 from the Central Office: 15 to 18 mA

Audio In/Out Channel Specifications

600 ohm output impedance

Designed to function with DIALOGIC's AEB

Common ground signals allow interfacing to conventional audio equipment.

Receive gain: +2 dB to -2 dB

Transmit gain: -10 dB to -14 dB to the Central Office, into 900ohm (Dialogic AEB compatible)

DTMF Receiver Specifications

Amplitude for detection: -31 to -5 dBm/tone,

(normal level dial tone enabled.)

Amplitude for detection: -26 to –10.5 dBm/tone,

(high level dial tone enabled.)

Tone present detect time: 45 ms minimum

Tone absent detect time: 40 ms minimum

Dial Tone Generation Specifications

Dial Tone Level is -12 dBm +/- 2 dB, into 900 ohms

Dial Tone frequencies are 350 + 440 Hz, +/- 0.5%

"Loud Dial Tone" Level is -7 dBm +/- 2dB, into 900 ohms.

Call Progress Detector Specifications

Amplitude for energy present detect (320-510Hz)

Minimum detect level: -30 dBm

Note: The energy detector is accurate within 35 ms.

Equipment Supplied

DCR-112 package:

1 - DCR-112 Card Rack

1 - CRH-200 Host Card

1 - User Manual (this document)

1 - 9 pin to 9 pin female / female, straight through, serial communications cable

1 - PWR-255 Power Adapter (129-255-0000)

4 - 3/4" Mounting Screws

1-12 CPI-201 Cards as ordered.

Ordering Information

Product Model: DCR-112

Order Number: 318-112-0000

Product Model: CPI-201

Order Number: 213-201-0000