Nortel Networks 1000 - Manual (Page 775)

Architecture 775
Table 326
DS-1 line interface pinout for NTBK04 cable (cont’d.)
From 50-pin MDF
connector To DB-15 Signal name Description
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.
Table 327
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.
Table 328
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.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
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.