[cisco-voip] SIP Trunk for ISP's - DTMF SIP Notify

[Paul van den IJssel]

Got it! It's a GenBand SBC.
In the SIP header I see that the CUCM supports both SIP NOTIFY and INFO.

- Paul

2010/6/1 Nick Matthews <matthnick at gmail.com>

> Software MTPs will do this.
>
> -nick
>
> On Tue, Jun 1, 2010 at 4:34 PM, Paul van den IJssel <pijssel at gmail.com>
> wrote:
> > Hi Guys,
> >
> > Currently I'm testing a SIP Trunk with our ISP. Everything is working
> fine
> > but I don't get the DTMF to work. This because my SCCP phones only
> support
> > OOB DTMF. So to get it to work with SIP RFC2833 (in-band) I need an
> > expensive transcoder. But now we've set the SIP Trunk to SIP Notify
> > (out-band) which should work with the IP Phones OOB, but all I get is
> > 'SIP/2.0 403 Forbidden'.
> >
> > How do I get this to work without the use of a hardware Transcoder?
> >
> > Best regards,
> >
> > Paul van den IJssel
> > Digacom
>  > _______________________________________________
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> > cisco-voip at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-voip
> >
> >
>
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