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Frame Slip Alarms and Noi...

Frame Slip Alarms and Noises Occur When the eSpace U1910

Created: Dec 24, 2018 11:22:03Latest reply: Feb 5, 2019 10:48:28 618 4 7 0 0

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Frame Slip Alarms and Noises Occur When the eSpace U1910 Connects to a Device Through the T1 Trunk

Symptom

When the eSpace U1910 connects to a device through the T1 trunk, a lot of frame slip alarms and noises occur.

Possible Cause

The possible causes are as follows:

E1 jumper caps are not removed on the CVP board, affecting the E1 working mode.
The MRS parameter TdmCodec is not set to U_LAW.
The clock source is not configured.

Solution

Check the E1 jumper caps on the CVP board and remove all jumper caps. For details about the jumper locations, see the product installation manual.
Run the show mrsparas command to check whether TdmCodec is set to U_LAW. If no, run the config modify mrsparas tdmcodec ulaw command to set this parameter to U_LAW. By default, this parameter is set to A_LAW, but it should be set to U_LAW in T1 mode.
Run the show system clocksource information command to check the clock source configuration. If the configuration is incorrect, run the config system clocksource command to configure the clock source.
If the fault persists, contact the service provider.

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Nicholas.Guldan.Lee

Created Dec 29, 2018 14:10:18

E1 jumper caps are not removed on the CVP board, affecting the E1 working mode

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Steve001 Created Dec 30, 2018 15:47:12 (0) (0)
this is only one of the possible reasons，and if it is this reason，I think the issue will be occurred on Delivery period，it may not occur on the normal running period~

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johnfish

Created Feb 5, 2019 07:20:04

excellent knowledge

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Collaboration

Created Feb 5, 2019 10:48:28

Thanks Bro

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