Why does my telephone seem to need four wires? | on ElectriciansForums

Discuss Why does my telephone seem to need four wires? in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

R

ralphonz

Hi,

According to all my reading telephones only use two or three wires, so why when i try to use any cable with two wires will my phones not work (there is no dial tone).

I'm trying to get an extension lead to go from the master socket to another room. All of the available leads only have two wires in them, and there are many other satisfied customers claiming they work with their phones. I've tried this with two phones and get the same results.

I should also mention that my sky router is connected to the same master socket and the internet works fine.

Any help anyone can provide would be great.
 
I've tried it! It won't work, but if i use an older cable with four wires it does work.

I just bought a cable with 2 to 2 and 5 to 5 and i can't get a dial tone with it.
 
Standard connections as stated are 2 & 5 terminal 3 for ring signal on slaves. If you have a exchange system installed the other cabes are used for features within this system.
 
Standard connections as stated are 2 & 5 terminal 3 for ring signal on slaves. If you have a exchange system installed the other cabes are used for features within this system.

Ok, so is it possible that incorrect wiring inside the master socket is what is causing this?
 
I have a really long 10m rj11 extension cable which i could use, provided i get it to work with a two wire cable. Don't need a slave as i only want one phone in the house.
 
Ok, so is it possible that incorrect wiring inside the master socket is what is causing this?

Possible...but is straight forward, bt masters usually have 2 screw terminal maked A & B, which are connected to the main incoming cable. There are then additional idc push terminals to connect extentions from
 
Ok we are not talking abaut masters and slaves now, your saying you are trying to wire a telephone direct into master instead of plugging it into the rj45 socket...!!
 
Are you exceeding your REN allowance?

If you have a number of Analogue devices on your phone line this could be the case as the telephone line will be the power source... if your equipment is digital then it shouldn't be a concern.... typical max allowance is 4 REN before you start getting issues
 
Are you exceeding your REN allowance?

If you have a number of Analogue devices on your phone line this could be the case as the telephone line will be the power source... if your equipment is digital then it shouldn't be a concern.... typical max allowance is 4 REN before you start getting issues

Don't think so. Only other device is a sky wireless router.

I have tried the phone with the ADSL filter and without it (straight into the master socket) and get the same results.
 

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