Nortel Circuit Card Installation Manual page 837

Table 265
DS-1 line interface pinout for NTBK04 cable
From 50-pin
MDF connector
pin 48
pin 23
pin 25
pin 49
pin 24
NTAK20 Clock Controller (CC) daughterboard
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
Digital Trunking requires synchronized clocking so that a shift in one clock
source results in an equivalent shift of the same size and direction in all parts
of the network.
The NTAK20 clock controller circuitry synchronizes the CS 1000S,
CS 1000M Cabinet, and Meridian 1 PBX 11C Cabinet to an external
reference clock and generates and distributes the clock to the system. The
CS 1000S, CS 1000M Cabinet, and Meridian 1 PBX 11C Cabinet can
function either as a slave to an external clock or as a clocking master to the
network.
The NTAK20AD and NTAK20AA versions of the clock controller meet
AT&T Stratum 3 and Bell Canada Node Category D specifications. The
NTAK20BD and NTAK20BA versions meet CCITT stratum 4
specifications. See "NTAK20 Clock Controller daughterboard" on
NTRB21 DTI/PRI/DCH TMDI card
Signal name
T
R
FGND
T1
R1
Circuit Card
Page 837 of 906
Description
transmit tip to
network
transmit ring to
network
frame ground
receive tip from
network
receive ring from
network
page
Description and Installation
735.