I have a SIP gateway that works with both inbound/outbound calls. However when I place an outbound call to an external source through the PSTN I can't pass DTMF. In call manager the route pattern sends calls to the SIP gateway via a SIP trunk in call manager. It matches a POTS dial-peer and sends the calls out to the PSTN fine. In this config I can't pass DTMF.
I can configure h323 on the sip router and an h323 gateway in call manager and it works fine. So I have a hybrid inbound SIP to call manager and an outbound h323 to PSTN type gateway.
Most searches return DTMF issues with CUBE type routers that talk to an SBC. However mine is SIP to PSTN directly using a 2811. So I'm using a POTS dial peer to send calls out the router through the serial interfaces.
Is my hybrid setup the thing to do or will SIP from CUCM to PSTN send DTMF?
