Regular Jack Numbers?? (RJ11, RJxx, RJ45)

[PeteWeedon]

First, what I know (or think I know), then the question about what I want to know:

Here in the UK, the phone cord connects into the wall socket via an RJ11.

The other end of that cord connects into the phone via a connector resembling an RJ45 but with only 6 contacts rather than 8. A Modem cord similarly has RJ11 on one end and that same 6-way (often only 2 used) on the other.

What is the correct name and/or identity number for the connector at the phone/modem end of the flexible cord?

I'm looking to buy some but I'm handicapped by not knowing what to Google for!!


Best regards,

Pete W.

If you can keep your head when all about you are losing theirs - you haven't seen the latest Change Note!

 

[PeteWeedon]

OK, I've discovered one of my errors!

The UK wall connection isn't an RJ11. It doesn't seem to be an RJ-anything!


Best regards,

Pete W.

If you can keep your head when all about you are losing theirs - you haven't seen the latest Change Note!

 

[ANFPS26]

RJ-11 4 pin
RJ-12 6 pin
RJ-45 8 pin

Jim

 

[Servamatic]

You can find the USOC configurations in the downloadable file below.

http://www.servamatic.net/cd/servamaticcd.zip

Hope this helps

Richard S. Anderson, RCDD

http://www.servamatic.net

 

[DukeSSD]

Hi,
I admit it is a nightmare.
The "basic" RJ numbers denote the type of connector, the "other" RJ numbers denote particular wiring conventions for those types of connecotrs.
The one that plugs into the modem, or sometimes the phone, or even goes from the phone to the handset (the sort you find on the modem / modem card or to connect a phone to your modem / card is "basic" RJ11. Yes, usually only two pins are wired.
This seems to be the american phone standard.(not sure about the two wires here but the connector is RJ11)
The "BT" connector, with the release latch on the side (not the top / bottom) is not an RJ standard, it has a name but not RJxx, it is just a BT connector in the UK.
The RJ45 is a bit bigger (and has 2 more pins) and is used for ethernet, token ring, RS232, etc.(Each with a different RJ "Other" name depending how it is wired.
So the wall socket is a BT connector, the plug / socket on the modem is an RJ11 connector.

http://shopping.kelkoo.co.uk/b/a/ss_rj11_bt.html

should make things clear.
You can buy a RJ11 to RJ11 cable and then plug one end into BT via a BT to RJ11 adapter, also shown on the above link, or you can buy a BT to RJ11 modem cable.
Hope this is cllear enough....it is late and I'm tired.

 

[PeteWeedon]

Thank you all for your inputs. In the course of my searching, I found this site

http://www.landlinephones.co.uk/vie...-31--_431A_standard_BT_plug_(pack_of_5_plugs)

which answered my queries about the various RJxx plugs and the UK (British Telecomm) pattern plugs. (Each type of plug is linked-to from the side-bar of that web page.)

Now I have a query about interconnection between The BT431A and the RJ10 for a dial-up modem lead but I'll start a new thread for that.

Thanks again,


Best regards,

Pete W.

If you can keep your head when all about you are losing theirs - you haven't seen the latest Change Note!