Nortel Networks 311 User Manual
Architecture
877
From 50-pin MDF
connector
To DB-15
Signal name
Description
pin 25
pin 2
FGND
frame ground
pin 49
pin 3
T1
receive tip from network
pin 24
pin 11
R1
receive ring from network
The connection to the external digital carrier is through a 15-position male
D-type connector.
D-type connector.
Table 362
DS-1 line interface pinout for NTBK04 cable
DS-1 line interface pinout for NTBK04 cable
From 50-pin MDF
connector
To DB-15
Signal name
Description
pin 48
pin 1
T
transmit tip to network
pin 23
pin 9
R
transmit ring to network
pin 25
pin 2
FGND
frame ground
pin 49
pin 3
T1
receive tip from network
pin 24
pin 11
R1
receive ring from network
The connection to the external digital carrier is through a 15 position Male D
type connector.
type connector.
Table 363
DS-1 line interface pinout for NTBK04 cable
DS-1 line interface pinout for NTBK04 cable
From 50-pin MDF
connector
to DB-15
signal name
description
pin 48
pin 1
T
transmit tip to network
pin 23
pin 9
R
transmit ring to network
pin 25
pin 2
FGND
frame ground
pin 49
pin 3
T1
receive tip from network
pin 24
pin 11
R1
receive ring from network
Clock controller interface
The clock controller interface provides the recovered clock from the external
digital facility to the clock controller daughterboard through the backplane.
Depending on the equipped state of the clock controller, the clock controller
interface enables or disables the appropriate reference clock source, in
conjunction with software.
digital facility to the clock controller daughterboard through the backplane.
Depending on the equipped state of the clock controller, the clock controller
interface enables or disables the appropriate reference clock source, in
conjunction with software.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.