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Wiring inside phone junction box

  • 19-07-2022 3:45pm
    #1
    kelbal
    Registered Users Posts: 839 ✭✭✭


    I'm trying to tidy up some of the wiring at home. Our old alarm system is wired into the phone line. I want to strip the cabling out, so assumed it would be no issue pulling the wires within the phone junction box. However, when I did this, signal was completely lost to the house phone & broadband. I put it back, and all is good again. In the circled bit in the picture, is where the 4 wires from alarm system went in. I'm guessing I can just do something like connect 2 pairs of the connections together with wires to create a loop or something, letting me get rid of the alarm stuff - but if anyone had a definite idea, I'd appreciate it.

    https://postimg.cc/cgC0731S




Comments

  • #2
    The Cush
    Registered Users, Registered Users 2 Posts: 15,679 ✭✭✭✭The Cush


    I posted a wiring diagram a few months back, if you do a search of my posts.

    I'm away from home on my phone right now, I'll have a look later if you don't find it first.



  • #3
    The Cush
    Registered Users, Registered Users 2 Posts: 15,679 ✭✭✭✭The Cush


    eircom NTU interface.pdf

    Are you removing the alarm wiring completely? if so, it should be a simple matter of disconnecting them from the rear of the socket without it affecting your phone and broadband.

    I see the resistors have been removed, with the wiring removed (alarm fault situation) I wonder if this disables the phone and broadband. I would try the short loop between the top IN and the bottom OUT connections, that may restore the circuit.

    Note this from the NTU doc (older version of the NTU)

    Alarm Termination

    Wiring to Alarm systems and ISDN lines are terminated on IDC blocks using the normal IDC terminating tool. A number of zero ohm resistor straps shall be removed as required. The wiring to the alarm control panel must be connected to the red IDC block. This is marked 'in' and 'out'. The wiring to the alarm unit is terminated on the connection points marked 'in' and the wiring from the alarm unit is terminated on the connections marked 'out'. The two resistor straps marked AL must be disconnected to complete the circuit.

    The alarm unit is now connected and it will over ride the use of the PSTN socket in the event of alarm activation. Please note that a faulty alarm unit may cause PSTN service to fail on the front socket outlet. The alarm unit is now connected and it will over ride the use of the PSTN socket in the event of alarm activation. Please note that a faulty alarm unit may cause PSTN service to fail on the front socket outlet.




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