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Numbers normalizing but returning some sort of DTMF error and won't wring phones. RRS feed

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    so I call into the system, and i see the numbers are normalizing fine, it even matches a user. but the users phone never rings

    is there something here that im missing

    user

    log

    Has anyone seen this before?

    Friday, April 27, 2012 5:43 PM

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    Its a Aspect Unified IP 7 Dialling System, its coming from their sip proxy

    I re-configured the circuits on that side to have RCF = ON, and voilia, it worked.

    • Marked as answer by MikeLeger Friday, April 27, 2012 7:15 PM
    Friday, April 27, 2012 7:15 PM

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    The SDP offer from the gateway needs to include lines like this

    a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16,36

    The trace you collected should have the full SDP of the INVITE. If you don't have a line with 'telephone-event', that's why you are getting this error.

    What kind of gateway are you using?

    Friday, April 27, 2012 6:59 PM
  • Question
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    Its a Aspect Unified IP 7 Dialling System, its coming from their sip proxy

    I re-configured the circuits on that side to have RCF = ON, and voilia, it worked.

    • Marked as answer by MikeLeger Friday, April 27, 2012 7:15 PM
    Friday, April 27, 2012 7:15 PM