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E1 MCU cascade method

Publication Date:  2012-09-26 Views:  233 Downloads:  0

Issue Description

8620 cascades with ZTE MCU, there is mosaic when ZTE main meeting place communicate with two terminals connected to 8620. All terminals connect to 8620 see mosaic when watch ZTE main meeting place.

Alarm Information


Handling Process


Root Cause

E1 cascade is that physically connect two MCU with E1 transmission line. Because E1 line is fixed, so we must set this only route well- set E1MC source and target E1 port.
We should notice: clock synchronize, superior MCU use internal clock, junior MCU use outer clock, and choose the source of outer clock, the clock source should be cascade outer clock that when setting ME16 board get. So that we can realize the cascade.
When setting E1/V35/ISDN(H.320) cascade, we must keep the synchronization of superior and junior.