Solved DTMF not working

Discussion in '3CX Phone System - General' started by next2, May 10, 2017.

Tags:
Thread Status:
Not open for further replies.
  1. next2

    Joined:
    Apr 19, 2009
    Messages:
    39
    Likes Received:
    0
    Hi,

    We moved our current IPBX install from Asterisk to 3CX, using the same SIP provider.
    Since then, DTMF is not working anymore. From our desk phones, and 3CX soft phones.
    So, there is probably something wrong in our SIP trunk config, or with the extension config?
    What should we check ? Something with the codecs ? For now, defaults are G711a/u, which is really common.
    We also tried unchecking/checking PBX delivers audio on the trunk and extension, but still no result.
    Any help would be warmly welcome!
     
  2. leejor

    leejor Well-Known Member

    Joined:
    Jan 22, 2008
    Messages:
    10,837
    Likes Received:
    296
    It may have something to do with the DTMF Method that your sets are using. Codec should not matter unless you are using DTMF audio only with a lower rate Codec. In the case of a VoIP provider you should be sending DTMF as a "message", and possibly as audio. Many sets have an "auto" setting.
     
  3. next2

    Joined:
    Apr 19, 2009
    Messages:
    39
    Likes Received:
    0
    Hi, thank you for your answer!
    FYI, I changed the trunk codecs list to G.711 U-law only, and now it's all right.
     
Thread Status:
Not open for further replies.