Hi, guys and gals.
Does anyone know what a Disconnect Cause=33 means?
I am receiving this on calls placed to the PSTN from a 2851 gateway passing through a Siemens PBX? I don´t see that code tabulated in Cisco´s voice documentation. My calls establish themselves, but get cut at random intervals.
Doing a Q931 debug returns
Jul 22 21:26:47.000: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8 callref = 0xC77A
Cause i = 0x80A181 - Unknown cause value
I am assuming the code is generated by Siemens.
You are correct the far-end is sending the disconnect and not providing a reason.
Were you a part of this call? It looks like the call was up for some time before it got dropped but you'll have to do some debugging on the PBX to see the real reason the call was ended.