Ntak20 Clock Controller (Cc) Daughterboard - Meridian Nortel 1 Option 11C Technical Reference Manual

Table 146
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 via 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 will result in an equivalent shift of the same size and direction in all
parts of the network. On Option 11C systems, synchronization is
accomplished with the NTAK20 clock controller circuit card.The Clock
Controller circuitry synchronizes the Option 11C to an external reference
clock, and generates and distributes the clock to the system. Option 11C can
function either as a slave to an external clock or as a clocking master. The
NTAK20AA version of the clock controller meets AT&T Stratum 3 and Bell
Canada Node Category D specifications. The NTAK20BA version meets
CCITT stratum 4 specifications. See "NTAK20 clock controller" on
page 503.
If an IP Expansion multi-cabinet system is equipped with digital trunk
cards, it is mandatory that at least one trunk card is placed in the Main
Option 11C cabinet. A cabinet that has a digital trunk must have a
clock controller.
NTRB21 DTI/PRI/DCH TMDI card
Signal
name
T
R
FGND
T1
R1
IMPORTANT
Option 11C and 11C Mini
Page 465 of 544
Description
transmit tip to network
transmit ring to network
frame ground
receive tip from network
receive ring from network
Technical Reference Guide