Ntak20 Clock Controller (Cc) Daughterboard - Nortel Enterprise 1000 Reference Manual

Page 204 of 236
Table 55
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

553-3023-211 Standard 1.00 June 2001
NTRB21 DTI/PRI/DCH TMDI card
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 will result in an equivalent shift of the same size and direction in all
parts of the network.
On Succession CSE 1000 systems, synchronization is accomplished with the
NTAK20 clock controller circuit card. The clock controller circuitry
synchronizes the Succession CSE 1000 to an external reference clock, and
generates and distributes the clock to the system. The Succession CSE 1000
can function either as a slave to an external clock or as a clocking master to
the network.
The NTAK20AD version of the clock controller meets AT&T Stratum 3 and
Bell Canada Node Category D specifications. The NTAK20BD version
meets CCITT stratum 4 specifications. See "NTAK20 clock controller
daughterboard" on page 25.
Each Media Gateway that has a digital trunk must have a
clock controller clocked to an external reference clock.
Signal
Description
name
T transmit tip to network
R transmit ring to network
FGND frame ground
T1 receive tip from network
R1 receive ring from network
IMPORTANT