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CLOCK goes to ‘sus’ and BMs go to critical.

• The Clock has the important role in MBM exchange where the clock is generated by the Central module (CM) and is distributed to SSU and BTU plane (BUS Plane).
• From the BTU which is BUS termination, the different Base Module terminate.
• It means all the BM which are connected with the CM are in sync. with respect to clock.
• The same clock goes to time switch clock crystal. If there is any disturbance in the clock ,the same goes to various module (BM) and this affects the BM and the same goes down.