Clock Switch Explanation; Auto Cross Connect Explanation - Raisecom RC3000 PCM User Manual

RC3000-2E1: single E1 direction.
RC3000-2E1 (ADM): dual-E1 direction.
RC3000-4E1: single E1 direction.

7.1.4. Clock switch explanation

In factory default status, clock mode of RC3000 is slave clock (trace first E1); the device
can switch clock by itself in clock auto-switch mode according to practice so that all
devices can work under a uniform clock. You can also set the work clock manually. Once
powered on RC3000 will first synchronize with configured clock. If this clock is invalid, in
auto clock mode RC3000 will switch the clock according to work status and in manual
clock mode, it will keep history configuration.
Suggestion: please be attention to clock mode when organize your network with lots of
RC3000s and make sure of uniform clock.

7.1.5. Auto cross connect explanation

In factory default status, RC3000 can cross connect user-board channels with first user
E1. For simple application RC3000 can work normally without any configuration. Details
are as follows: User-board in first slot:
If the channel number of the user-board is not configurable, system will cross connect
user-board's channels with those of first user E1 channels 1-8 one by one according to
user-board channel number (note: this number should be equal or less than 8); if the
user-board channel number is configurable, system will give it 8 channels and cross
connect the 8 channels with first user E1 channels 1-8.
User-board in second slot:
If the channel number of the user-board is not configurable, system will cross connect
user-board's channels with those of first user E1 channels 9-16 one by one according to
user-board channel number (note: this number should be equal or less than 8); if the
user-board channel number is configurable, system will give it 8 channels and cross
connect the 8 channels with first user E1 channels 9-16.
User-board in third slot:
If the channel number of the user-board is not configurable, system will cross connect
user-board's channels with those of first user E1 channels 17-24 one by one according to
user-board channel number (note: this number should be equal or less than 8); if the
user-board channel number is configurable, system will give it 14 channels and cross
connect the 14 channels with first user E1 channels 17-30.
RC3000 does not cross connect idle channels except RC3000-2E1 (ADM). RC3000-2E1
(ADM) cross connect the same idle channels of 1 E1 and 2 E1 to realize the transfer of
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