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  1. InspironXD

    Mitel 5000 SIP trunking DTMF working intermittently

    Per tech support you can't change the payload type or ptime. I know this was possible on their other models. The ptime changes to 30 when the DTMF is changed from inband to rfc2833.
  2. InspironXD

    Mitel 5000 SIP trunking DTMF working intermittently

    Without changes in the SBC nothing.
  3. InspironXD

    Mitel 5000 SIP trunking DTMF working intermittently

    This is from the INVITE on all incoming calls: c=IN IP4 X.X.X.X t=0 0 m=audio 20478 RTP/AVP 18 0 101 a=rtpmap:18 G729/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:18 annexb=no a=fmtp:101 0-15 a=ptime:20
  4. InspironXD

    Mitel 5000 SIP trunking DTMF working intermittently

    I think it's a bug in the 5000. By default the DTMF Encoding Setting is set to "G.711 Mu-Law" which I assume means inband but the SIP header still shows RFC2833 with DTMF Payload of 96. If you change it to RFC2833 the payload stills stays at 96 but the ptime goes to 30. Go figure. My...
  5. InspironXD

    Mitel 5000 SIP trunking DTMF working intermittently

    I ran a trace and this is what I get: SIP/2.0 200 OK Via: SIP/2.0/UDP X.X.X.X:5060;branch=z9hG4bK-eb251f-4eb9a14b-9cd2c1a-472bd From: "WIRELESS CALLER" <sip:XXXXXXXXXX@X.X.X.X>;tag=63e65a45-13c4-4eb9a14b-9cd2c1a-34216a14 To: <sip:0667@X.X.X.X>;tag=Mitel-5000_4202495480-901 Call-ID...

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