[cisco-voip] fast busy when phone CFA via CUBE

[Kenneth Hayes]

Do you have MTP configured on your IOS router?

Sent from my iPhone

On Aug 1, 2013, at 9:36 AM, Erick Wellnitz <ewellnitzvoip at gmail.com> wrote:

> I have an issue which is probably very easy to fix but I think I'm making it more complex than I need to.
>
> I have a Nortel that we are migrating to CUCM 9.1 from.  In the interim, we have interated the two using SIP via CUBE.  PSTN gateway is H323.  I wouldn't normally do this but decisions get made and we have to deal with it.
>
> Call from Nortel to IP Phone works fine.  Call forward that same IP Phone to a PSTN number and the call connects to the external number as if nothing was wrong but the Nortel phone gets dropped with a 'fast busy'.
>
> Traces and TAC (626731957) that my colleague opened seem to show a codec /capabilities mismatch but I can't find a codec mismatch in the system at all and our reporting/monitoring tool shows the call trying to connect as G711u on both sides.
>
> Is this a situation where an MTP is gong to be necessary or is there a way to avoid mandatory MTP?
>
> Thanks in advance!
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