[cisco-voip] QISG over SIP between CUCM and IOS TDM Gateway

[Justin Steinberg]

add '*isdn global*-*disconnect' *under your D channel (e.g. int s0/0/0:23)
for your QSIG T1s


On Wed, Dec 18, 2013 at 8:57 AM, Robert Schuknecht <rschuknecht at gmx.de>wrote:

> Hi all,
>
> I am trying to setup a QSIG over SIP connection between a CUCM and a IOS
> TDM
> Gateway. Calls are working so far. But when an IP-Phone tries to end a call
> it seems to be that the signaling from CUCM to the Gateway is not
> understood
> by the Gateway.
>
> When I hang up on the IP-Phone the CUCM sends some SIP INFO packets and
> after 20-30 sec CUCM actually sends a SIP BYE message to Gateway. I
> captured
> the SIP Traffic between the CUCM and the Gateway and I saw in Wireshark
> that
> there are DISCONNECT messages in the QSIG over SIP INFO packets. I assume
> these DISCONNECT messages are not correctly understood by the Gateway. The
> Gateway only ends the call when the CUCM sends a SIP BYE Message.
>
> I have tried CUCM Version 8.6.2 and 9.1.2 and some IOS 12.4 and 15.2
> Versions.
>
> Regarding my configuration:
>
> Enabled ISO QSIG on SIP Trunk pointing to the Gateway
> Defined switch-type primary-qsig
> Defined qsig decode under voice service voip
> Configured signaling forward unconditional under voice service voip and
> also
> on the dial-peers
>
> So, my questions are:
>
> Should QSIG over SIP work between CUCM and a IOS Gateway?
> Can anybody provide some working sample configurations? (Could not find
> anything useful on CCO)
>
>
> Just for completeness, I have attached the relevant Debug output.
>
>
> Thanks in advance,
>
> Robert
>
>
>
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