View source for H323 Send DTMFs


This page describes DTMFs send related configuration of H323 channel.

The parameters involved (located in 'general' section of h323chan.conf) are:
* dtmfmethods
* honor_dtmf_detect

=== dtmfmethods ===

This parameter configures the allowed methods and the order they are tried.
Allowed methods are:
* '''rfc2833''' Send DTMFs as RFC2833 RTP signals. This method will be used if external RTP is started and remote party advertised RFC2833 support.
* '''h323''' Send DTMFs using H323 connection capabilities.
* '''inband''' Send DTMFs in audio stream. This method will succeed if media is started, the tone generator module is loaded and there is a translator from PCM (yate 'slin' format) to current rtp format.

The default value of this parameter is 'rfc2833,h323,inband'.<br>
This parameter is apllied on reload for new calls.<br>
Invalid values will be ignored. E.g.<br>
'''foo,h323''' will be handled as '''h323'''<br>
'''foo,h323,foo2,inband''' will be handled as '''h323,inband'''<br>
'''foo,foo2''' will be handled as default '''rfc2833,h323,inband'''<br>

This parameter can be overridden when routing by an '''odtmfmethods''' parameter for outgoing calls and '''idtmfmethods''' parameter for incoming calls.<br>
Also, it can be overridden when sending DTMFs (chan.dtmf messages) by a '''methods''' parameter.

===honor_dtmf_detect===

This parameter instructs the H323 channel to use the detected method when sending DTMFs.<br>
The detected method won't be used if not enabled.<br>
This parameter is enabled by default and can be changed at runtime for new calls only.<br>
It can be overridden when routing by an '''ohonor_dtmf_detect''' parameter for outgoing calls and '''ihonor_dtmf_detect''' parameter for incoming calls.<br>
Also, it can be overridden in chan.dtmf messages by a parameter with the same name.


'''See also'''

* [[Telephony]]

[[Category:H323]] [[Category:DTMF]]