Missing first 5 seconds of audio

Discussion in '3CX Phone System - General' started by night1, Jan 4, 2018.

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  1. night1

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    I'm having an issue with all inbound calls missing the first 3-5 seconds of audio BUT if you hang up and call right back the audio is not missing, if you wait about 3 minutes to call back the first 3-5 seconds of audio is missing again.

    Have checked with Vitelity and they do not see an issue

    tested this on a Windows and Linux deployment
    Firewall checker has no issues.

    Thoughts?
    Thanks,
     
  2. mixig

    mixig Active Member

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    Make that two calls, with and without audio at the begining of the call, analyze both of them with wireshark and see is audio is really missing; what is happening after you provider sends ACK message to your PBX (you can see by time stamp in wireshark is there a problem with your provider, does audio coming right after ACK).
    If everything is OK try the same on the LAN interface.
    Also is there a missing audio in one way or two way?
     
  3. sip.bg

    sip.bg Active Member

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    Looks like a network issue, check ping time, packet loss, jitter, latency.
    pathping <PBX_IP_address> is an useful command (Microsoft Command Prompt), run from a PC in the network with phones.
     
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