How to test anlaog phone without land line ?

Discussion in 'General Electronics Chat' started by naseeam, Jul 2, 2018.

  1. naseeam

    Thread Starter New Member

    Jan 4, 2017
    19
    0
    Please advise how to test analog phone without analog phone service.

    Is there inexpensive instrument I can purchase to do this test ?
     
  2. jaredwolff

    Member

    Jul 1, 2017
    58
    13
    Are you testing to make sure there's a dial tone? Or more like a loopback? You can buy a cheap PBX box of some kind, plug it in and make sure you can issue commands to it and that you can hear the response. Folks on here who have worked on these systems may have a better idea..

    (If you do a search for Cisco SPA112, that is the relatively cheap box you can buy. Plenty of them, and their cousins, on eBay for cheap cheap cheap)
     
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  3. R.E.

    Member

    Jul 29, 2017
    50
    16
    I've used these in the distant past and they work well;
    https://www.vikingproductstore.com/Line-Simulators-Ringdown-Circuits/

    I also built a circuit from an Electronics Now project that incorporated supplying dial-tone and talk-battery to analog sets from a home PBX type project. It was rife with mistakes and circuit errors though, I did manage to get them figured out and the circuit working.

    There are plenty of schematics available from searching Google as well.
     
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