This is traversing an Asterisk box via a PRI. The user calls the IVR (1-800-CALL-DHL), receives audio, but is not able to present DTMF to engage the IVR. With some light research it appears that the DSP is not activating until the call is answered.
DTMF on the SIP side is set to RFC2833 -- calls all work fine when originating from a SIP phone connected to the same device.
Any suggestions on what needs to be done to pre-emptively enable DSP and or early media on the PRI (outbound)??
Thanks,
Anthony
---SIP---->Asterisk----PRI---->Shoretel
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Anthony D Cennami
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