[Asterisk-Users] inband dtmf on ploycom ip501?

[Kanuri, Seshu (Company IT)]

Add the line as under to your sip.conf entry.

Progressinband=no 
;progressinband=never   - is erroneous
 
Seshu Kanuri

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Chris
Miller
Sent: Tuesday, November 01, 2005 2:23 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] inband dtmf on ploycom ip501?

Damon Estep wrote:
> Anyone have any hints on how to get the polycom ip501 to send dtmf 
> inband, our upstream providers require inband and the native rfc2833 
> format of the polycom does not work.

In order for inband to make it beyond Asterisk, you need to disable
rfc2833 control in the Polycom config file "sip.cfg" (i.e. via ftp
server).

tone.dtmf.rfc2833Control="0"

It appears that although Asterisk recognizes and uses inband dtmf
internally, rfc2833 is used on the external channel. I noticed this
behavior when remote IVR systems weren't acknowledging dtmf.

Regards,
	Chris

Chris Miller
President - Rocket Scientist
ScratchSpace Inc.
(831) 621-7928
http://www.scratchspace.com
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