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What will Happen about the Service when the Frame Formats of CES E1 Ports is Different

Latest reply: Apr 11, 2017 08:24:25 1294 2 0 0 0
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Hello, everyone!


A mobile backhaul network was reconstructed to a packet network. The original 2G BTS services were transmitted through CES E1 services. After services of site A were cutover, the services became unavailable and the BTS failed to be started.


Thanks.

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user_2790689
Created Apr 11, 2017 08:01:46

ding
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Osaideo
Created Apr 11, 2017 08:24:25

Checked the service configuration. To be specific, performed an LSP ping test and PW ping test to check packet service configuration. The test results showed that the packet service configuration was correct.
Checked the CES service configuration. The frame format of the port on the RTN equipment was set to CRC4 multiframe. Changed the frame format to unframe and the CES emulation mode from CESoPSN to SAToP. The BTS services recovered.
Communicated with wireless engineers and found that the frame format was set to double frame for E1 signals of the BTS. Different frame formats caused the service interruption.
Conclusions and Suggestions
During CES E1 service configuration, if the E1 frame format of the interconnected equipment is unknown, it is recommended that the frame format be set to unframe and the CES emulation mode be set to SAToP for the RTN equipment. Then the RTN equipment can transparently transmit E1 signals of various frame formats.
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