[Freeswitch-users] Adding Allow-Events header to 100 and 200 SIP messages

SebA spa at syntec.co.uk
Thu Jun 11 18:41:17 MSD 2015

I would like to test adding the following header to the 100 Trying and 200
OK messages:
Allow-Events: telephone-event
This is to try and interoperate with Cisco equipment that behaves this way.
As it stands, perhaps as a result of not sending this header from our
FreeSWITCH box, the Cisco is not offering RFC 2833 in the SIP ACK and
therefore DTMF does not work (as they don't support SIP INFO).
Is there any way of doing this in FreeSWITCH?  Many thanks.

Kind regards,

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