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Chapter 5 Application Configuration Procedures IPmux-1/1E Installation and Operation Manual
5-18 Checking the Application
6. If you have underflows or overflows at non-set intervals of time:
Try to gradually increase the jitter buffer size.
Check that there are no E1alarms (such as LOS or LOF), through the IPmux
E1/T1 Statistics. If problems do exist on the E1/T1 level, check both physical
connections (cables and E1 ports) and E1/T1 parameter configuration
compatibility between the TDM equipment and the IPmux units (such as
CRC and CAS Enable/Disable).
Check that the Bundle connection configuration was made correctly.
For further information, see the IPmux Troubleshooting and Diagnostics chapter.
Using TDM Equipment Statistics and Functionality – Step 2
After you have verified all the issues in Step 1, make the following checks.
1. Check that there are no alarms or BER on the TDM equipment.
2. If you are using a PABX check voice quality. IF echo exists, verify that you
haven’t configured the jitter buffer size to be too large (remember that the
initial configuration should be 3 ms, unless it is required to be larger due to
problems seen under the Bundle Connection Status).
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