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Silent Audio Calls

David Jumbi

Hi I have a Sophos XG-125 (new deployment). I am having silent calls from one extension to another within the organization. SIP works fine as the call can be placed and received but the media isn't going through (RTP not somehow not flowing). I have tried both system system_modules sip load and system system_modules sip unload commands but there was no change. Anyone has a solution to this its really bugging me.



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  • 0

    hello guys anything else you guys can suggest , its really frustrating and final piece of the puzzle in my deployment. Support from Sophos is horrible as they reply to my emails once a week.

  • 0 in reply to David Jumbi

    When I've had this happen (admittedly only for external calls) doing a TCPDUMP from the CLI will show you what's going on. The SIP packets are easy to understand and you'll be able to see the endpoints and ports in the call setup. If you have a LAN to LAN rule in place then I'd have expected that to be ok, the RTP stream should be phone to phone directly but again, the contents of the call setup will show you wants going on.

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  • 0 in reply to David Jumbi

    When I've had this happen (admittedly only for external calls) doing a TCPDUMP from the CLI will show you what's going on. The SIP packets are easy to understand and you'll be able to see the endpoints and ports in the call setup. If you have a LAN to LAN rule in place then I'd have expected that to be ok, the RTP stream should be phone to phone directly but again, the contents of the call setup will show you wants going on.

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  • 0 in reply to carbon15

    you know the funny thing is external calls are working I can call my cell phone and media is flowing both ways , My cell phone can ring an extension and media flows both ways. An externally registered extension (meaning the extension is remote and registers to the pbx using public IP) can ring an internall extension but media is one way. internal calls dont work at all. This i the greatest mystery ever. Some internal phones are deskphones (on voice vlan) and some are softphones (on data vlan). Whatever the test scenario internal extension to extension the call will go through but media will not , it will just be silent

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