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lafon
2007 Feb 09
1
RFC2833 SIP trunks and DTMF
I have a telco providing DTMF inband, they say they can't provide it any
other way. This is creating headaches for me.
What is the common method for SIP DTMF? Kpml, or 2833 or inband?
My handsets don't support inband so I'm tying up some expensive
resources to convert the inband DTMF to out-of-band DTMF...
Can you recommend a vendor in US that provides SIP with DTMF in RFC