Linksys SPA-3102 endng calls

Discussion in 'UK VOIP' started by Zid Swanish, Jan 14, 2008.

  1. Zid Swanish

    Zid Swanish Guest

    I am using Linksys SPA-3102 like this. I have a GSM gateway connected to the
    PSTN port, when I dial the GSM gateway from my mobile the SPA-3102 answers
    it and then gives me a dial tone using my VOIP account, I can then make
    calls from my mobile through my VOIP account, (Great I hear you say) The
    problem is if I want to make another call from my mobile through me VOIP
    account I need to end the call on my mobile and dial again. What I would
    like to do if possible is just hang up the VOIP side of the call and have a
    dial tone again without redialling into the Gateway. Any ideas? Thank you in
    Zid Swanish, Jan 14, 2008
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  2. Zid Swanish

    Brian A Guest

    I don't know if I've really understood you but I think I have. I don't
    know how you would solve this problem with the apparatus 'as
    is'...though it would be interesting to read of a solution.
    If I was faced with this I would make use of a DTMF decoder chip. I'd
    interface the PSTN ATA connection to GSM gateway with a relay
    controlled switch. Then I'd devise some electronics to make use of the
    DTMF decoder chip to control the relay such that when, say, a '#'
    signal was received it open circuited the link - hence the call goes
    In summary...detect a '#' being dialled by the mobile phone and open
    circuit the connection to the PSTN connection on the ATA in response.
    Brian A, Jan 14, 2008
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  3. Zid Swanish

    Jono Guest

    Does that mean you thought he might be asking how to make a follow-on
    call when using the PSTN-to-VoIP gateway when ringing from his

    Jono, Jan 14, 2008
  4. Zid Swanish

    mr deo Guest

    I don't know if I've really understood you but I think I have. I don't

    I rekon you understood him......
    But he's gonna scratch his head a little bit ;).
    mr deo, Jan 15, 2008
  5. Zid Swanish

    Brian A Guest

    Well, Yes, but I have never tried doing this as I don't have a PSTN
    line so was unable to comment as to whether this might be possible 'as
    is' but I couldn't see a way.
    Building up a DTMF detector isn't difficult. I once did it to control
    a remote computer over the phone. Put together that and perhaps a
    transistor to drive a relay and it's done.
    Brian A, Jan 15, 2008
  6. It depends on your service provider and your ATA. As I know, no ATA
    can do it, even my Shang332. because the fxo call state machine would
    never back to wait new call after they get calls. If you use
    asterisk, you could write a dial plan to repeat it.

    liuzhaoyongxx, Jan 16, 2008
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