Hello all,

We have recently configured a SIP trunk (through flowroute.com) and everything seems to be working fine, except we have an issue with DTMF.

If 84-13-32 is set to "Disabled" we can pass DTMF on outgoing calls, however, we can't receive DTMF when someone calls into our system (Dial by name won't work for example).

If 84-13-32 is set to "RFC2833" then the effect is reversed. We can receive DTMF just fine but it won't work on outgoing calls.

The only other setting that could have an affect on this is probably 84-13-31 "DTMF Payload Number" but I'm not exactly sure what to change this value to.

Has anyone came across this issue? I would appreciate any help.