When the eSpace U1910 connects to a device through the T1 trunk, a lot of frame slip alarms and noises occur.
Step 1 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.
Step 2 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.
Step 3 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.
Step 4 If the fault persists, contact the service provider.
The possible causes are as follows:
E1 jumper caps are not removed on the CVP board, affecting the E1 working mode.