Ds-1 Carrier Interface - Avaya Nortel Communication Server 1000 Reference

The ON setting for DPNSS (U.K.) is not supported at this time.

DS-1 Carrier interface

Transmitter
The transmitter takes the binary data (dual unipolar) from the PCM transceiver and produces
bipolar pulses for transmission to the external digital facility. The Digital Signal – Level 1 (DS-1)
transmit equalizer enables the cabling distance to be extended from the card to the Digital
Signal Cross-connect – Level 1 (DSX-1), or LD-1. Equalizers are switch selectable through
dip-switches. The settings are shown in
Table 267: NTRB21 switch settings
Distance to Digital Cross-
Receiver
The receiver extracts data and clock from an incoming data stream and outputs clock and
synchronized data. At worst case DSX-1 signal levels, the line receiver operates correctly with
up to 655 feet of ABAM cable between the card and the external DS-1 signal source.
Connector pinout
The connection to the external digital carrier is through a 15 position Male D-type connector.
Table 268: DS-1 line interface pinout for NTBK04 cable
From 50-pin MDF
connector
pin 48
Circuit Card Reference
Connect
0 - 133 feet
133 - 266 feet
266 - 399 feet
399 - 533 feet
533 - 655 feet
To DB-15
pin 1
Table 267: NTRB21 switch settings
Switch Setting
1 DCH F/W 2 (LEN 0)
Off Off
Off On
Off Off
Off On
Off Off
Signal name
T
Architecture
on page 659.
3 (LEN 1) 4 (LEN 2)
Off On
On Off
On Off
Off Off
Off Off
Description
transmit tip to
network
July 2011 659