Softphone V14 NAT/ALG error on local LAN

Discussion in 'Windows' started by matrixdesert, Mar 10, 2016.

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  1. matrixdesert

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    Hi everyone!

    I'm facing a problem with my softphone registered via invite mail to my 3cx.
    When dialing a number after starting the Softphone everything is smooth.

    When dialing a number again (second call) the call fails.
    *************
    REQUEST 'INVITE' - some of SIP/SDP headers may contain inconsistent information or modified by intermediate hop
    SIP contact header is not equal to the SIP packet source(IP:port):
    Contact address:192.168.0.232:49310
    Received from :192.168.0.232:49315
    *************
    The PC with the Softphone is on the same LAN (IP/subnet) with the 3CX PBX.
    No NAT/Firewall or something else in between. Why is the port changing!?

    Im running 3cx V14 SP3 Build 49169.513 with Softphone V14.0.49169.0.

    Any hints!?
    Thx!
     
  2. NickD_3CX

    NickD_3CX Support Team
    Staff Member 3CX Support

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