Nortel Networks TP-1610 SIP user manual Appendix E Mediant 2000 Clock Settings

Mediant 2000 SIP User’s Manual E. Mediant 2000 Clock Settings

Appendix E Mediant 2000 Clock Settings

The gateway can either generate its own timing signals, using an internal clock, or recover them from one of the E1/T1 trunks.

a. To use the internal gateway clock source configure the following parameters:

•TDMBusClockSource = 1

•ClockMaster = 1 (for all gateway trunks)

b. To use the recovered clock option configure the following parameters:

•TDMBusClockSource = 4

•ClockMaster_x = 0 (for all "slave" gateway trunks connected to PBX#1)

•ClockMaster_x = 1 (for all "master" gateway trunks connected to PBX#2)

Assuming that the gateway recovers its internal clock from one of the "slave" trunks connected to PBX#1, and provides clock to PBX#2 on its "master" trunks.

In addition it is necessary to define from which of the "slave" trunks the gateway recovers its clock:

•TDMBusPSTNAutoClockEnable = 1 (the gateway automatically selects one of the connected "slave" trunks)

Or

•TDMBusLocalReference = # (Trunk index: 0 to 7, default = 0)

Note 1: To configure the TDM Bus Clock Source parameters, refer to Section 5.9.4 on page 68.

Note 2: When the Mediant 2000 is used in a ‘non-span’ configuration, the internal gateway clock must be used (as explained above).

Version 4.4 205 July 2005