[cisco-voip] Re: Please help with DTMF Events Through SIP Signaling

[Jared Mauch]

On Fri, May 06, 2005 at 03:18:41PM -0600, Jordan Schidlowsky wrote:
> Hi All,
> 
> We are having some problems transmitting DTMF tones from PSTN through to
> our SIP proxy.  From what I understand we would like to implement it
> using SUBSCRIBE/NOTIFY feature described in DTMF Events Through SIP
> Signaling feature on the cisco.
> 
> Currectly we have two options.  Our current version of IOS does not
> support cisco's proprietary DTMF-relay through SIP-notify.  We will
> either be using dtmf-relay through rtp-nte (RFC 2833), or the
> SUBSCRIBE/NOTIFY feature described in the SIP Signalling feature.
> I would really like the get the SUBSCRIBE/NOTIFY feature working.  If
> anyone has this working or has any knowledge it would be greatly
> appreciated.  
> 
> Right now when any SIP application trys to SUBSCRIBE to
> the cisco we always receive a 481 Call Leg/Transaction does not exist.  
> The documentation and examples on this issue are scarce and I'm having a
> hard time finding info about it.  Is the SUBSCRIBE sent within a dialog
> or outside a dialog?
> 
> Also is anyone sucessfully using out-of-band dtmf-relay using
> sip-notify?  If this feature is working well we might consider upgrading
> IOS to a newer version.  currently running 12.3(6)......
> 
> Once again ANY help or suggestions would be greatly appreciated.
> 
> Thanks all!
> -Jordan
> 
> 
> 
> -------------------------------------------------
> Modern Digital Communications http://www.mdci.ca

-- 
Jared Mauch  | pgp key available via finger from jared at puck.nether.net
clue++;      | http://puck.nether.net/~jared/  My statements are only mine.