Specifications

Chapter 5 Application Configuration Procedures IPmux-4 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.

Step 2 – Using TDM Equipment Statistics and Functionality

After you have verified all the issues in Step 1, check the following:

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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