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Hardware Thread, RJ11/12 socket to RJ45 plug adapters in Technical; I need to move a telephone without moving the phone line. The obvious way to do this is to use ...
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    Geoff's Avatar
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    RJ11/12 socket to RJ45 plug adapters

    I need to move a telephone without moving the phone line. The obvious way to do this is to use a couple of RJ45/RJ12/11 adapters and use the cat5 wiring already present to move the line to where I want it. However I can't seem to find anywhere to buy the adapters! Does anyone know where I can get these? I've tried looking on CPC but their seach system is terrible. :S

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    plexer's Avatar
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    You can plug an rj11/12 into an rj45?

    Ben

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    nephilim's Avatar
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    PC World do them instore, but they're not cheap. Think they are ~£15 per adapter if not more.

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    plexer's Avatar
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    Re-crimp the phone lead into an rj45 I've also done that before.

    Ben

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    Geoff's Avatar
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    I'd rather use an adapter, I've tried plugging them in directly in the past and it invariably ended up in damage. As for re-crimping the cable, I can't as we don't own the equipment. Really, the simplest option is to just get an adapter.

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    3s-gtech's Avatar
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    Is this what you need eBay - The UK's Online Marketplace

    We already have this done in one of our offices, tidied things up a bit.

  7. Thanks to 3s-gtech from:

    Geoff (18th January 2012)

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    We used Assynia ones from CMS PLC. Can't remember the part code though.

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    plexer's Avatar
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    The last phones we got for our system came with 2 leads, one with rj45 on and the other with a normal phone lead.

    I use rj11/12 cables from my environment monitor and then convert them to cat5 by plugging them into a sensor that has rj45's each end so maybe just and rj45 coupler would do?

    Seems strange that the current wallboxes for your phones have rj11/12 sockets and not a standard BT plug.

    Ben

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    kaphc's Avatar
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    Is it a balun you are after? That's the term phone companies tend to use - have you tried searching under that term rather than adapter? Beware - they come in different types so if you're ordering, it might be wise to choose somewhere with a robust returns policy. From memory, it comes down to whether they are primary or secondary baluns but don't quote me on that!

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    I assume it's these that you are after? Voice Converters/Line Adapters

    For most things you'll want the secondary ones.

    Steve

  12. Thanks to steveg from:

    Geoff (18th January 2012)

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    Geoff's Avatar
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    Yes indeed, if someone can explain what the differences are?

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    I believe primary and pbx are largely the same thing (someone will correct me if i'm wrong) and have a capacitor between 2 of the pins, which ones I can't remember right now, I've been teaching all day! (this is the same as your master BT socket which has the capacitor in it)

    Secondary ones do not have this capacitor. I once made the mistake of assuming pbx ones would be the ones to use on an internal phone system, apparently not, lots of crackling on the line and generally not working, secondary ones were fine.

    Steve

  15. Thanks to steveg from:

    Geoff (18th January 2012)

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    Geoff's Avatar
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    Yeah, I read this on wikipedia which I think explains it:

    This master socket contains a high voltage surge protection[clarification needed] (SP1) to suppress high voltage spikes etc, a 1.8 µF capacitor (Bell Circuit) to feed the AC ringing and a 470 kΩ resistor (R1 Out of Service Resistor) to provide remote testing when no telephones are plugged into any sockets. Additional internal extension (secondary) sockets are wired off the master socket (connected in parallel using the IDC system) and do not contain the surge protector, bell circuit capacitor and the out-of-service resistor.
    British telephone sockets - Wikipedia, the free encyclopedia

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    plexer's Avatar
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    Are you going, pbx - telephone wall socket - cat5 point - structured cabling - cat5 point - phone?

    Ben

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    Geoff's Avatar
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    ATM I'm going on one line:

    BT Master socket -> DSL Microfilter -> Structured Cabling -> Phone.

    On the other line, its the same with no DSL involved.

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