Known Issues

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This page includes known issues, workarounds and fixes. It has the following levels:

general Symptom Class -> specific Symptom Class -> Symptoms -> Workarounds/Fixes


Random Call Drops

Random Call Drops can have different sources, first it is necessary to identify the source of the calldrop:

* SIP Side
* PSTN Side (ISDN, Analog, GSM)
* beroFix Side

ISDN Side Call Drops

ISDN Call drops can have different reasons, most like the Release cause helps to identify the source of the problem.

Release cause: 102 Timer expired

Symptom

Calls are dropped randomly, ISDN Debug Files show Release Cause "102" Timer expired. Deeper Analysis with the Wireshark-Filter-Line:

lapd.control.s_ftype == 0x0002

produces a some lines looking like:

ISDN-rej.png

then you will most likely have an ISDN Side Problem on this Port.

workarounds/fixes

Try connecting the cable to another port and see if the Rejects follow to the new port. If yes, then either:

* cable
* NTBA 
* Central Switch from provider

are broken, contact your provider for assistance.

If the errors stay on the previous ports, it's most likely a broken beroFix modules, which needs replacement.