analog pbx extender

Discussion in 'VOIP' started by Henry Cabot Henhouse III, Jan 9, 2007.

  1. Hi ...

    I asked about a year ago, and at that time, the fxo/fxs boxes I looked at
    required all sorts of dial plans etc., not exactly the out of the box
    plug-n-play solution I was hoping for.

    I'd like to extend 2 analog pbx lines off site. We have multiple managed
    bonded T's at the main site, and at the remotes a basic Verizon dsl at one
    and a Comcast (or is it Time Warner this year?) business HSI at the other.
    When someone calls the extension, the off prem analog line should ring. When
    I go off hook, I should get pbx dial tone.

    Of course, I can't invest thousands, so I am looking for the most cost
    effective solution I can find.

    Thanks in advance!
    Henry Cabot Henhouse III, Jan 9, 2007
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  2. Henry Cabot Henhouse III

    ldemsp Guest

    2 pair of Linksys SPA3102 will do. One for FXS and one for FXO gateway
    role. If you can do the setup, it costs less than 400 USD.

    However, as at least one of them gets dynamic IP address, you need a
    public fixed IP VoIP switch to maintain the actual IP address. This
    kind of service is available free of charge, eg at

    If you have firewall at the central site, it should be configured to
    pass the UDP calls to the 2 SPAs (eg. 5060 and 5061 UDP port,
    respectively, plus a range for the voice channels). The SPAs should be
    configured accordingly.
    ldemsp, Jan 10, 2007
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