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SIP provider uses RTP 10000:20000

Discussion in '3CX Phone System - General' started by kalvik, Mar 11, 2017.

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  1. kalvik

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    The question is how adjust RTP ports to include this range? Using 3CX 15.0.62928.5.
     
  2. eagle2

    eagle2 Well-Known Member

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    You don't need to adjust anything.
    Provider may use UDP ports 10000-20000 (probably an Asterisk), your 3CX PBX -- 9000-9255.

    Make sure you have forwarded ports correctly through your router and make sure 3CX firewall checker passes tests.
     
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  3. kalvik

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    Port forward 10000:20000 to 9000:9225
    Or
    Just a simple port forward
     
  4. GiannosC_3CX

    GiannosC_3CX Guest

    Hi kalvik,

    The 3CX system phone works on the range of ports 9000-9255, so you need to open that ports to work properly your system. A simple port forward to your system. The range that mentioned above is used from other system probably from asterisk.
     
  5. eagle2

    eagle2 Well-Known Member

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    This will not work, sorry.

    On 3CX you need to forward destination address: port (public address: port) to local address of 3CX: port, in 1:1 relation -- port 9000 to 9000, 9001 to 9001, ... You need to test it afterwards with 3CX firewall checker.
    Ports in the range 10000-20000 are source ports (bound to source address of the other PBX / VoIP provider), not destination ports for traffic coming to 3CX.
     
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    #5 eagle2, Mar 13, 2017
    Last edited: Mar 13, 2017
  6. Sopock

    Sopock Member

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    That may be suspicious to provider. Imagine that ATA from provider is using that (first) range. We really need per trunk port range override?
     
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  7. vectorpro

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    I have the same issue with my VoIP Provider. According to them the 3CX send RTP traffic under the UDP port 9000~9255... and it has to be on the range 10000~20000, is there something to do on the 3CX.?
     
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