Gate controller modem interface (?)

Discussion in 'General Electronics Chat' started by flash bang, Jun 10, 2014.

  1. flash bang

    Thread Starter New Member

    Jun 10, 2014

    My first post, hoping to save some money!

    Problem: Intercom/automatic gates (Telguard system) entrance to flats is not working; can open gates with phone but now when you call the number it just rings out (normally answers, you press 'hash' and gates open).

    Local company have quoted £2400 to replace system.

    I've looked and found a secondary pcb, with lots of corrosion on tracks, which i guess is some kind of interface. Picture below.

    Does anyone recognise pcb / problem please?
  2. ScottWang


    Aug 23, 2012
    The picture is not clear, and you need you show two sides of PCB.
  3. Dodgydave

    Distinguished Member

    Jun 22, 2012
    looks like a standard UK telephone socket, line connects to terminals 2-5, and ringer connects to 3-5, possibly terminal 3 is faulty or broken.
  4. flash bang

    Thread Starter New Member

    Jun 10, 2014
    Thanks gents - yes, it's a standard uk master telephone socket mounted on pcb (found it on google image search & got new one from screwfix).

    I've replaced it and now telephone line is operating correctly (i.e. it answers), but the gates still don't open via remote key ('hash' key on telephone). I'll check some more & get on to Telguard in the morning and keep you posted on my success (or not).