sdp

  1. Callback calls - no Media in SIP SDP

    When call back are placed we are seeing SIP invites, but there is no audio information in the SDP so the call drops. There is no issue on the same trunk route for inbound and outbound calls. In the problem call flow a caller's number is captured in the 3CX call queue for call back. 3CX calls an...
    • cmarston
    • Thread
    • sdp sip/sdp
    • Replies: 10
    • Forum: UK

  2. How to configure 3cx to accept UPDATE SDP message from carrier?

    I see on the logs that if my sip trunk carrier sends UPDATE SDP message to 3cx, 3cx will send 500 internal server error. How to configure 3cx to accept UPDATE SDP message from carrier? I attached a PCAP file showing that. Thanks,

  3. Registration and media issues with overlapping subnets between sites

    Similar to a regular trunk, is it possible to manually set the SIP contact and SDP connection fields for a gateway trunk? In fact, was able to set the SIP contact in the outbound parameters but can’t find where and how to update the SDP connection field for a gateway trunk, ie: Patton...
  4. Alexandre Peloquin

    I'm earing 3CX's music on hold instead of the provider's message invalid number

    When I make a call with an invalid number or a long distance that is not one. The provider plays me a message that the number is invalid or that I do not have to do the 1 before the number. However this provider sends me a sendonly and this has the impact that the 3CX plays music on hold instead...

  5. Add "user=phone" parameter to "From" field

    Hey, I'm currently setting up a custom SIP trunk to connect to connect to a provider, but they require that I modify some of the fields, but i'm having a problem getting the user=phone command to add to the From field or "From : Host Part " field. This is what the packet capture looks like...
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