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Issue 4 October 2002 163555-233-116
11
Stratum 3 clock
The Stratum 3 clock is an optional feature for digital frame timing that couples the
clock output to local clocks. This chapter provide information on setting the option
switches on the clock. For installation information refer to the appropriate
installation or upgrade book for your system.
NOTE:
The information in this chapter does not apply to the G700 Media Gateway
configurations. There is no way to physically connect the G700 tone clock
(resident on the motherboard) to an external Stratum 3 clock source.
Set clock options
There are four sets of option switches on the clock. Proceed as follows.
1. Set the options on the clock input board (CI) per Table 16.
Table 16. CI Option Switch Settings
Switch Function Position
1 T1 select OFF = enable (default)
ON = disable
2 CC select OFF = enable
ON = disable (default)
3 Framing select OFF = ESF
ON = D4 (default)
4 BX.25 OFF = enable
ON = disable (default)