wiring external sounders on telephone lines

Discussion in 'Alarms, CCTV & Telephones' started by creedo, 24 Jan 2012.

  1. creedo

    creedo

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    I'm an electrician and so don't do much with telephones apart from the basics.
    I've been asked to wire in a "Bedlam Loud Tone Caller" to some ones phone system.
    Have done this as per the instructions, however when I connect sounder in phone line shows as engaged. As soon as I disconnect sounder phone line works as normal.
    Any help would be much appreciated.
    Thanks Creedo
     
  2. OwainDIYer

    OwainDIYer

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    You wire the sounder between pins 3 and 5 in the line jack sockets, not across pins 2 and 5.

    If there's not already you will need to install a master line jack socket with a ringing capacitor.

    Without the capacitor in series with the ringer the ringer is causing a DC short across the line.
     
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  4. creedo

    creedo

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    Thanks for that, I'd just worked it out, it is a master socket and I have wired in to 2 and 5 not 3 and 5.
    Thanks again
     
  5. Caroline Carton

    Caroline Carton

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    Any idea what value capacitor is used here
     
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  7. OwainDIYer

    OwainDIYer

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    1.8 µF non-polarised eg polypropylene, in UK master sockets.
     
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    DIYnot Local

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