[Freeswitch-users] start_dtmf when no RFC 2833

[Phillip Jones]

Thanks Chris.

So something like.

s = session:getVariable("switch_r_sdp")

if string.find(s, "telephone-event/8000") == nil then

    session.execute("start_dtfm")

end

Is telephone-event/8000 the correct thing to look for? I guess it is from
the dial plan example.


On Tue, Mar 17, 2015 at 3:10 PM, Christopher Rienzo <cmrienzo at gmail.com>
wrote:

> You could set the "execute_on_answer" variable on the b-leg dialstring to
> execute the lua script.  In the lua script, you'd use
> session:getVariable("switch_r_sdp") and then some pattern matching to
> figure out if "telephone-event" is in the SDP.  If not, then do
> session:execute("start_dtmf", "")
>
> Chris
>
>
> On Tue, Mar 17, 2015 at 3:05 PM, Phillip Jones <pjintheusa at gmail.com>
> wrote:
>
>> Hi All,
>>
>> The following dial plan detects RFC 2833 and if it is not present, runs
>> the "start_dtmf" application.
>>
>> <condition field="${switch_r_sdp}"
>> expression="a=rtpmap:(\d+)\stelephone-event/8000" break="never">
>> <action application="set" data="rtp_payload_number=$1"/>
>> <anti-action application="start_dtmf"/>
>> </condition>
>>
>> I need to do this on the outbound leg - using Lua. Can anyone point me to
>> some code example that would achieve this or get me started?
>>
>> Any help appreciated.
>>
>> Thanks
>>
>>
>>
>> Phil
>>
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>
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>
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