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Thread: Incoming Transfered SIP Call "Not supported"

  1. #1

    Default Incoming Transfered SIP Call "Not supported"

    Hi,

    Here is the scenarios Quadro 16x with latest firmware.

    1. Call comes in via external SIP provider...using a G729 codec..sits behind a simple ADSL modem/firewall with all ports NATed to Quadro box
    2. Answered by virtual extension 99 (setup for the external SIP provider)
    3. Forwards call to auto attendant - 00
    4. Message is played (and heard) to dial the required extension. When you do so the call is forwarded to extension (a SIP phone).
    5. Upon answering the call on the SIP phone the call is dropped (with call statistics reporting "Not supported")

    Now here is the confusing part.

    If I call via a landline/mobile to our DID the above scenario happens (ie drops call) but...

    If I call via the SIP provider to the DID (still dialing a real number... not a SIP number)... the call comes in the same way but... connected without any problems.

    Delving into the logs here is the point of failure:
    .776 AcceptMedia: line #21[0], incoming media list is empty.
    .776 <<ERROR>> OnSIPCallAccept: line #21[0](e:27), no acceptable media parameters for call with ID 5965938891037978457.

    Just for the record the SIP phone handsets are Yealink T28P with the latest firmware 2.71.0.165. Preferred codecs all round are G729

    Any ideas?

  2. #2

    Default

    Hi Kent,

    Did you manage to find a solution. We the exact issue, Quadro with latest firmware with T26 Yealink handsets.

    Regards Nick.

  3. #3

    Default

    What about the codec list in the system for the extensions

    Did you enable G729 for all ?

    Kev

    Quote Originally Posted by kent View Post
    Hi,

    Here is the scenarios Quadro 16x with latest firmware.

    1. Call comes in via external SIP provider...using a G729 codec..sits behind a simple ADSL modem/firewall with all ports NATed to Quadro box
    2. Answered by virtual extension 99 (setup for the external SIP provider)
    3. Forwards call to auto attendant - 00
    4. Message is played (and heard) to dial the required extension. When you do so the call is forwarded to extension (a SIP phone).
    5. Upon answering the call on the SIP phone the call is dropped (with call statistics reporting "Not supported")

    Now here is the confusing part.

    If I call via a landline/mobile to our DID the above scenario happens (ie drops call) but...

    If I call via the SIP provider to the DID (still dialing a real number... not a SIP number)... the call comes in the same way but... connected without any problems.

    Delving into the logs here is the point of failure:
    .776 AcceptMedia: line #21[0], incoming media list is empty.
    .776 <<ERROR>> OnSIPCallAccept: line #21[0](e:27), no acceptable media parameters for call with ID 5965938891037978457.

    Just for the record the SIP phone handsets are Yealink T28P with the latest firmware 2.71.0.165. Preferred codecs all round are G729

    Any ideas?

  4. #4

    Default

    Quote Originally Posted by KSComs View Post
    What about the codec list in the system for the extensions

    Did you enable G729 for all ?

    Kev
    Hi Kevin,

    After reading through a bunch of forum issues I tried the "Do Not Send External RE-INVITE" which worked for us.

    thanks for replying.

    I have another issue regarding Exchange mailbox but will start a new thread for this.

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