[cisco-voip] ccm sip trunking

[Cristobal Priego]

do you have SW and/or HW conference resources ?

if you don't have HW resources you won't be able to create a conference
call. If i remember correctly the codec on SIP trunks is G.729, you will
need a transcoder or you can try with a SW MTP.

I  had a similar problem, but my call was going to a CUBE gateway. on the
trace i was seeing MTP errors

I configured a Software MTP resource and my problems went away

2010/4/7 Peter Slow <peter.slow at gmail.com>

> are there any odd-looking messages in your callmanager event log?
> Saying things abotu media resource lists?
>
> On Wed, Apr 7, 2010 at 1:10 PM, cisco.voip <cisco.voip at verizon.net> wrote:
> > All, need help -
> > I am Sending and Receiving call from my skinny cucm phones to the sip
> > provider fine.
> > However, when connected cucm phone -to-  sip trunk phone,
> > when I try to conference on the cucm phone, conf button will not take
> > affect.
> > then i hang up and it says 'invalid conference participant'.
> >
> >
> > Thanks
> >
> >
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> >
>
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