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eircom line voltages

  • 18-04-2007 10:23pm
    #1
    wexfordman
    Closed Accounts Posts: 490 ✭✭


    Hi,

    Would anyone be able to clarify some details on eircom line voltages for me:-

    What is the line voltage on pstn line (50v or 24v I heard there are two different types) 50v I was aware of, but do some types of lines work of 24v line voltage (lines that connectr to a pbx)

    Also, what is the ringing voltage. My understaning was it was 75vac, but I have been told 45v also.

    Want to connect an ata, and one of those gsm adapters to a pbx external trunk, so just want to make sure I have my facts right.

    Regards,
    Wexfordman


Comments

  • #2
    lucernarian
    Registered Users, Registered Users 2 Posts: 9,235 ✭✭✭lucernarian


    From what I know, there is only one "type" of PSTN line supplied by eircom. 54 Volts DC is on any phone line. And an ordinary analogue pbx would be connected with ordinary lines I believe. I've never heard of any ringing voltage other than the 75 volt ac signal.

    But mabye someone can add some extra weight behind this? I don't work in the field.


  • #3
    JohnnieM
    Closed Accounts Posts: 716 ✭✭✭JohnnieM


    Just plug it in.. Once its an analogue external CO line .. you shouldnt have a problem...


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