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#134349 - 11/03/02 12:38 PM Telephone
Belgian Offline
Member

Registered: 10/10/02
Posts: 177
Loc: antwerp
What do phone plugs look like in your country?
This is how they look like here












Paul, I don't understand much about phone system but I know that in britain too, they use 2 wires in residential phone sockets. About 10 years ago I worked on a phone system in Britain and it used 3 wires. One, I believe was for the ringing. Can you explain to me more about the differences, how it works and why it changed to 2 wires?

[This message has been edited by Belgian (edited 11-03-2002).]

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#134350 - 11/03/02 01:31 PM Re: Telephone
C-H Offline

Member

Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden


Two or sometimes four-wire. Four wires are used to prevent eavesdropping. (If you have picked up one phone, the other phones on the line are "dead")

The plastic pin has to do with this too. When inserted it loops the feed-through via the phone (or other equipment) inserted. Imported two-wire modems and phones give you problems when you want both phone and modem on same socket. Phones are not my cup of tea, really. Therefore I doubt I can answer any questions.

As you can see, they accept RJ-11 plugs. However, the trusted old "Rikstelefon"-sockets remain the standard in new construction, despite serving only as RJ-11 adapters.

For some reason RJ-45 has now caught on as phone plug. I installed RJ-45 sockets for this use a few years ago, when they were not normally used for this purpose. Today you can buy RJ-45 extension reels.

[This message has been edited by C-H (edited 11-03-2002).]

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#134351 - 11/03/02 01:56 PM Re: Telephone
Hutch Offline
Member

Registered: 05/27/02
Posts: 383
Loc: South Oxfordshire, UK
I've posted this before so sorry for the repeat at http://electrical-contractor.net/ubb/Forum9/HTML/000063.html . Here is the old (pre-1990) South African standard. There are six contact surfaces: The outer pair are line 1 and the inner pair line 2. I assume the intermediate pair (not connected in the photos) would be line 3.





RSA now used the US standard as found on the back of your PC.

As PaulUK mentioned in the thread referred to above, it is similar to the older Australian phone jacks (these appear to have an extra pin with an additional pair of contacts that makes the design asymmetric). I was lucky enough to get a look at one of those in situ recently.


[This message has been edited by Hutch (edited 11-03-2002).]

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#134352 - 11/03/02 02:09 PM Re: Telephone
C-H Offline

Member

Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden
Deleted post on phone dials.


[This message has been edited by C-H (edited 11-04-2002).]

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#134353 - 11/03/02 06:18 PM Re: Telephone
Hutch Offline
Member

Registered: 05/27/02
Posts: 383
Loc: South Oxfordshire, UK
C-H,

Did you change your dial rotations when you switched road sides in the seventies? You yielded to the dark side of the force!



[This message has been edited by Hutch (edited 11-03-2002).]

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#134354 - 11/04/02 06:05 AM Re: Telephone
Texas_Ranger Offline
Member

Registered: 12/17/01
Posts: 2343
Loc: Vienna, Austria
You guys sure you don't mix up stuff here? I don't want to be impolite, but I think it was New Zealand dials that were backwards, not British.
And what's that stuff about Sweden having changed road sides in the 70es??????
I thought the last European country to change was Austria after Hitler occupied it in 1938!

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#134355 - 11/04/02 06:39 AM Re: Telephone
C-H Offline

Member

Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden
No, the dials haven't changed. But, yes, we did change side of the road in 1967 after a referendum where the vast majority of people voted for not changing (!)

But the cars have always had the steering wheel on the left hand side. Buses used to have it on the right hand side. (Have you noticed that we try to make things differently here? )

[This message has been edited by C-H (edited 11-04-2002).]

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#134356 - 11/04/02 07:09 AM Re: Telephone
SvenNYC Offline
Member

Registered: 08/19/02
Posts: 1685
Loc: New York City
I have a British-made phone here. The dial is similar to a standard American phone (it spins clock-wise with the numbers on the left side).

What is notable is the abscence of the letters that go with digits 2-9 (you know, like ABC-2, DEF-3, GHI-3, etc.).

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#134357 - 11/04/02 07:47 AM Re: Telephone
C-H Offline

Member

Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden
I went to check on old phones. They have the same dial as the British.

Where have I seen one that was reversed? Perhaps my mind has been playing tricks on me...

This just goes to show that I should always check before I write. I'll better call the doc and ask him to prescribe something...

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#134358 - 11/04/02 11:26 AM Re: Telephone
Texas_Ranger Offline
Member

Registered: 12/17/01
Posts: 2343
Loc: Vienna, Austria
No, you read it about British phones imported to New Zealand and fitted with a backwards dial. It spins the same direction, but the numbers are the other way round.

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