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Poor Inbound call quality - newbie

Discussion in '3CX Phone System - General' started by dbergsma, Oct 27, 2008.

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  1. dbergsma

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    Hi Folks,

    I have download 3cx free version - 6.1.0 on w2008, linksys spa942, and grandstream 4104 (v1.0.08) for FXO to PSTN.
    I'll do the upgrade once I have proof of concept working.

    Outbound calling works no problem.
    Calls between extensions seems to work fine.

    On PSTN In bound calling - my wife says I sound like Darth Vader with the sound of a light saber whirring in the background.
    On the IP phone - the PSTN in bound caller sounds fine, however, the PSTN caller hears a remake of star wars.

    Any ideas?


    Thanks in advance
    Dean.
     
  2. dbergsma

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    correction -- grandstream firmware is
    Software Version: Program-- 1.0.1.8 Loader-- 1.1.3.3 Boot-- 1.1.3.2
     
  3. galal202

    galal202 New Member

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    Hello dbergsma and welcome
    I have 4104 and it works fine with 3cx
    this my settings
    restore to factory set then reconfig it again
     
  4. mobilesoundz

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    I had a similar issue with a linksys 3102 i had to increase the gain settings to +15 which made it crystal clear and even over the wirelss lan :)
     
  5. galal202

    galal202 New Member

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    What about echo after +15gain?
     
  6. mobilesoundz

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    have not experienced any echo, no delay just a really nice quality voice... Try it and see what happens
     
  7. wzaatar

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    What codecs are you using on your IP Phone and your Grandstream PSTN gateway?
     
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  8. dbergsma

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    711u

    however, turned on pbx delivers audio. all is good.
     
  9. wzaatar

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    I can think of two reasons: Either the RTP packet size not correct, or it's a simple firewall problem...

    Cheers,

    W.
     
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  10. dbergsma

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    changed out grandstream with patton, no problems, I'm happy with 3cx now.
    can't say I would recomend grandstream.

    dean.
     
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