Generic selectors
Exact matches only
Search in title
Search in content

Modem over IP (with ATA-186)

Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
  • #25756 Reply

    I would like to connect credit card reader which incorporates a slow modem (V.21) to ATA-186 (or similar)RJ-11 port.

    At the other end of my LAN, a VoIP gateway would be connected to PSTN.

    Thanks in advance for comments about feasability or problems.


    #25757 Reply

    Claire, modems will not work in a VoIP environment due to the lack of synchronisation of information delivery and UDP having no error control.

    #25758 Reply


    I have had successful modem connections of 9600 and 14400 through the QTelNet line of FXS and FXO’s. We were able to go out of an external modem on a computer, into an FXS port, dial the “alias” of the other unit ( in your case it would be set up in a hotline scenario, i.e. as soon as the unit goes off-hook, the call is sent directly to the FXO ) and connect at the mentioned speeds with very good success. Check out: or contact me and I will be able to assist you in finding out more about the appplication at:


Viewing 3 posts - 1 through 3 (of 3 total)
Reply To: Reply #25758 in Modem over IP (with ATA-186)
Your information:

<a href="" title="" rel="" target=""> <blockquote cite=""> <code> <pre class=""> <em> <strong> <del datetime="" cite=""> <ins datetime="" cite=""> <ul> <ol start=""> <li> <img src="" border="" alt="" height="" width="">