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List: sip-implementors
Subject: Re: [Sip-implementors] Passing DTMF digits thru RTP payload
From: shivani.garg () flextronicssoftware ! com
Date: 2005-12-23 4:54:31
Message-ID: OFE855E943.23D0925F-ON652570E0.001958C3-652570E0.0019DD9E () flextronicssoftware ! com
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That entirely depends on the implementation. If we need to allow your proxy
server also knowing about the DTMF digits, we will use SIP INFO message as
it will be through the signaling path. Otherwise, if we want to avoid the
proxy server from tampering or knowing the DTMF digits, we will put in the
media path in RTP payload.
Shivani
Software Engineer - VoIP
Flextronics, Bangalore
"The thing always happens that you really believe in; and the belief in a
thing makes it happen."
"Asheesh Joshi"
<asjoshi@varaha.c
om> To
<shivani.garg@flextronicssoftware.c
12/22/2005 02:30 om>
PM cc
<sip-implementors@cs.columbia.edu>
Subject
RE: [Sip-implementors] Passing DTMF
digits thru RTP payload
Hi Shivani,
DTMF digits can also be sent using INFO SIP messages instead of RTP
payload.
Any specific advantage of using RTP of this purpose ?
-Regards
Asheesh.
Asheesh Joshi
Project Leader -SCA development.
Ph: +91-9924010013
Email: asjoshi@varaha.com
URL: http://www.varaha.com
-----Original Message-----
From: sip-implementors-bounces@cs.columbia.edu
[mailto:sip-implementors-bounces@cs.columbia.edu]On Behalf Of
shivani.garg@flextronicssoftware.com
Sent: Thursday, December 22, 2005 2:29 PM
To: sip-implementors@cs.columbia.edu
Subject: Re: [Sip-implementors] Passing DTMF digits thru RTP payload
Once a provisional reponse (183 Session In Progress) completes the first
offer-answer, the UA can surely send or listen DTMF digits. And these DTMF
digits can be passed whenever they are pressed, interepting the ringing
tone. Infact, Some services, usually free-toll-number services, try and
avoid being charged extra by deferring acceptance of a call as long as they
can, relying on still receiving DTMF digits over the half-connected call.
Shivani
Software Engineer - VoIP
Flextronics, Bangalore
"The thing always happens that you really believe in; and the belief in a
thing makes it happen."
-----Original Message-----
From: sip-implementors-bounces@cs.columbia.edu
[mailto:sip-implementors-bounces@cs.columbia.edu] On Behalf Of
kumar.vinodh@wipro.com
Sent: Wednesday, December 21, 2005 5:04 AM
To: sip-implementors@cs.columbia.edu
Subject: [Sip-implementors] Passing DTMF digits thru RTP payload
Hi *,
RFC 2833- passing DTMF digits thru RTP payload.
When trying to reach an IVR application, where in I select some option by
pressing the required digit.Now when does the digit get passed.Does it get
passed as on when the digit is pressed( early media) or it waits for 200
OK(for INVITE) from the IVR to finalise the session and then the digit will
get passed.
Thanks in advance.
Regards,
Vinodh
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