Best codec for using a modem on

Discussion in 'UK VOIP' started by Simon Finnigan, Aug 9, 2006.

  1. Hi all,
    I`ve seen this discussed in a thread here, but can`t find the thread. It`s
    going to smack me in the face 2 seconds after I post this message of course

    Someone told me of the best codec to use for a Sky box, or other modem use,
    on a Linksys PAP2. Anyone care to refresh my memory please?

    Simon Finnigan, Aug 9, 2006
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  2. Thus spaketh Simon Finnigan:

    More than likely be G711a
    {{{{{Welcome}}}}}, Aug 9, 2006
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  3. Cheers. it came with G711u as standard, just changed to a. Will see if it
    makes a difference to call quality for me now.
    Simon Finnigan, Aug 9, 2006
  4. Simon Finnigan

    Graham Guest

    Has anyone succeeded in getting a Sky box to communicate via VoIP?
    My tests have all been failures.
    Graham, Aug 10, 2006
  5. Simon Finnigan

    Tim Guest

    You also need to

    turn off echo cancellation
    Set `Jitter Buffer Adjustment` to disable

    I'd also be tempted to set `Use Pref Codec Only` to yes - just to
    makesure your service provider doesn't try to setup a call using another

    'Network Jitter Level' set to high (or higher) may help too.

    On a sipura device, use a 3.xx firmware. Infact, I don't think those
    settings exist in 2.xx

    I've not used a sky box, but I have in the past had our PDQ machine
    running with a gradwell account.

    Tim, Aug 11, 2006
  6. Coo. Which PDQ?

    I had a brief try with one (failed miserably) but I thought it was worth
    a shot when I read the modem specs.
    Thomas Kenyon, Aug 11, 2006
  7. Simon Finnigan

    Tim Guest

    hypercom something.

    Tim, Aug 11, 2006
  8. Probably the same type, I'll have another go.
    Thomas Kenyon, Aug 11, 2006
  9. So far I`ve had no joy. It dials out, and I can hear the two systems trying
    to sunchronise. They don`t seem to get off to a good start. `ll keep
    playing with settings, maybe even dig out a modem :)
    Simon Finnigan, Aug 11, 2006
  10. Simon Finnigan

    Jono Guest

    Which VoIP service provider are you using - not all are equal!
    Jono, Aug 11, 2006
  11. Currently trying it on
    Simon Finnigan, Aug 11, 2006
  12. Simon Finnigan

    Jono Guest

    Simon Finnigan brought next idea :
    Won't work. I've certainly never got faxing to work on

    I've had great success using Sipgate for faxing.
    Jono, Aug 11, 2006
  13. You managed to take that faxing success over to using a modem on sipgate?
    Simon Finnigan, Aug 12, 2006
  14. Simon Finnigan

    Jono Guest

    Simon Finnigan explained :
    er, yes - a fax modem.
    Jono, Aug 12, 2006
  15. I mean have you had a true modem connection runnign over sipgate, as in the
    modem inside a Sky box? :)
    Simon Finnigan, Aug 12, 2006
  16. Weird, worked for me. Though I must admit sipgate was more reliable.
    Thomas Kenyon, Aug 12, 2006
  17. Simon Finnigan

    Jono Guest

    No but I will try it out for you this weekend.
    Jono, Aug 12, 2006
  18. Simon Finnigan

    Graham Guest

    The ability to fax via VoIP would not necessarily mean that a faster
    protocol would work.
    G3 faxes usually negotiate down to as low as 9,600bbs, (the initial
    handshake is always 300bbs)

    AFAIK Sky STB's operate at 33.6kbbs and don't negotiate lower speeds.
    Graham, Aug 12, 2006
  19. Simon Finnigan

    Ivor Jones Guest

    Ah, so it's Sky's fault then.

    Personally I wouldn't give Murdoch the satisfaction of having my money.
    Nor would I entertain any system that insists I connect it to a phone

    Ivor Jones, Aug 12, 2006
  20. Simon Finnigan

    Graham Guest

    You may well already know this, but notwithstanding their *insistence*
    they only ever *enforce* that policy if you have a "multiroom" subscription.

    I have wondered if Sky actively knobble VoIP by somehow only allowing a
    small amount of latency.

    BTW I have never subscribed myself. I do have a box though, quite a lot
    worth viewing on FTA these days.
    Graham, Aug 12, 2006
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