Troubleshooting disconnect cause 0x64 on ISDN calls to PBX

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Mar 28th, 2007
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Does anyone know how to troubleshoot a disconnect cause 0x64? (invalid information element contents)

It?s an AS5350 connected to a NEC NEAX 2400 PBX.

The problems is with calls outboud through the E1 ISDN to the PBX.

I already tried setting "bearer-cap" to both Speech and 3100hz with no results.

Anything else to attempt?



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paolo bevilacqua Wed, 03/28/2007 - 12:09
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Please post the complete call setup and teardown as seen with "debug isdn q931" and "term mon".

The PBX may not like the calling/called numbers or type/plan, but is throwing an inappropriate error code.


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