Nortel Communication Server 1000M, Installation And Configuration Manual

Page: 45 / 122

Installing ISDN BRI hardware Page 45 of 120
ISDN Basic Rate Interface Installation and Configuration
Installing the clock reference on the SILC
The DSL#0 and DSL#1 on an SILC card can be configured as the reference
clock source, with DSL#0 being assigned for the primary clock reference and
DSL#1 being assigned for the secondary clock reference.
The loop number and location of the primary and secondary clock source is
configured in the Digital Data Block LD 73. Refer to the
ISDN Basic Rate
Interface: Features (553-3001-380) .
Procedure 11
Providing clock referencing on the SILC
Complete the following procedure to provide clock referencing on the SILC.
Note: To install the NTRB53 Clock Controller for CS 1000 Release 4.0
refer to ISDN Primary Rate Interface: Installation and Configuration
(553-3001-201).
1 Maintain the same polarity on each transmit and receive. Rewire the
selected Tx and Rx pairs (applicable to DSL0 and DSL1) to exchange the
Tx and Rx pair position. This rewiring is done at the Main Distribution
Frame (MDF).
2 Remove the phantom power jumpers (two jumpers per DSL) from the pin
headers.
3 Place the SILC in the selected IPE slot.
4 Configure the selected DSL as Terminal Equipment (TE) mode in LD 27.
5 Enable the clock in LD 60 to output the clock references to the IPE back
plane pins.
6 Configure the Clock Controller card to accept ISDN BRI clock reference.
7 Check the appropriate messages from the Clock Controller to ensure that
it is synchronized to the proper clock reference in LD 60).
8 Connect the ISDN BRI clock reference cables to the Clock Controller,
using the procedures which follow.
End of Procedure