Clock Controller Interface - Nortel Enterprise 1000 Reference Manual

Table 33
DS-1 line interface pinout for NTBK04 cable
From 50-pin MDF
connector
pin 48
pin 23
pin 25
pin 49
pin 24

Clock controller interface

Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
line receiver will operate correctly with up to 655 feet of ABAM cable
between the card and the external DS1 signal source.
Connector pinout
The connection to the external digital carrier is through a 15 position male D-
type connector.
to DB-15
pin 1
pin 9
pin 2
pin 3
pin 11
The purpose of the clock controller interface is to provide the recovered clock
from the external digital facility to the clock controller daughter board
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.
Each Media Gateway that has a digital trunk must have a
clock controller clocked to an external reference clock.
Note: Clocking slips can occur between Media Gateways that are
clocked from different COs, if the COs are not synchronized. The slips
can cause degraded voice quality.
NTAK09 1.5 Mb DTI/PRI card
signal name description
T transmit tip to network
R transmit ring to network
FGND frame ground
T1 receive tip from network
R1 receive ring from network
IMPORTANT
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