Telephone wiring guide and fault finding

[telectrix]

are you sure the slave socket is a slave. i.e. no capacitor?

 

[Guest111]

Hi if you are getting a hissing sound it could be a damaged connection or leg down to earth try disconnecting wire to 5 and swapping with a spare,any probs feel free to pm me.

 

[UNG]

Turns out to be extension wire on 5 at master that's causing problem - disconnect 5 and slave phone doesn't work any longer (of course) but noise on master phone disappears. Done a visual inspection of length of cable, but can't see any damage from clips.

I'm wondering if a) the slave socket if faulty (will try replacing), or b internal damage in cable, or c) picking up interference from somewhere?

Does this problem sound familiar to anyone whose installed telephone extensions?

Is the master an NTE 5 socket (split front plate) if it is it could be a fault on the plug in plate. also have you connected terminal 3 as this is not needed and can cause interference and reduced broadband speed

 

[sparc]

For several reasons I haven't returned to this until this week. Checked out suggestions phil d, UNG, and telectrix (thanks for those) - I think I've eliminated each - def slave socket (says on packet and no big cap.), checked each of pairs end to end - got continuity on each wire, and no insulation breakdowns. Also tried swapping pairs and got same result - noise on extension phone.

(BTW - I'm only connecting 3, 6, and 5 here)

Then a 'Doh!' moment. Unplugged the BB filter plugged into master socket and checked everything again. Now telephones working okay - bells on both, sound quality about same on both - phone on ext. not noticeably different to same phone on the master socket.

When I plug splitter/filter back into master, and plug phone into splitter (but not plugging BB modem into splitter) then also all good on telephony side.

As soon as I plug BB modem back into splitter all hell breaks loose again on phone plugged into extension socket - phone in master socket via splitter still fine.

So cabling to extension is good, extension socket is good, but introducing the BB modem puts all the noise on the extension phone.

I'm out of ideas, so will be hitting the 'ADSL for Beginners' websites again, to see what I'm missing - I'll let you know - eventually!

 

[UNG]

For several reasons I haven't returned to this until this week. Checked out suggestions phil d, UNG, and telectrix (thanks for those) - I think I've eliminated each - def slave socket (says on packet and no big cap.), checked each of pairs end to end - got continuity on each wire, and no insulation breakdowns. Also tried swapping pairs and got same result - noise on extension phone.

(BTW - I'm only connecting 3, 6, and 5 here)

Then a 'Doh!' moment. Unplugged the BB filter plugged into master socket and checked everything again. Now telephones working okay - bells on both, sound quality about same on both - phone on ext. not noticeably different to same phone on the master socket.

When I plug splitter/filter back into master, and plug phone into splitter (but not plugging BB modem into splitter) then also all good on telephony side.

As soon as I plug BB modem back into splitter all hell breaks loose again on phone plugged into extension socket - phone in master socket via splitter still fine.

So cabling to extension is good, extension socket is good, but introducing the BB modem puts all the noise on the extension phone.

I'm out of ideas, so will be hitting the 'ADSL for Beginners' websites again, to see what I'm missing - I'll let you know - eventually!

Try connecting 2 and 5 it just might work then if you need the bell circuit connect terminal 3 modern phones don't need this and can be a cause of ADSL interference

 

[eddieb1974]

You must use a BB filter on all sockets or you will get a hissing noise from the socket without the filter. Thats what the filter does it filters out the hiss.

Are you using filters on all sockets?

 

[Geordie Spark]

Once you have been on a while sx, you will see Tony is a mind of information, he may be a bit grouchy as he's lost his drug thread ATM.

Aye .... his bark's worse than his bite ...... he's a canny lad really.

I wish I had just a teeny little bit of his knowledge.

 

[sparc]

Many thanks to Phil D and others for help here - it was the splitter. I replaced the one I'd been using with the old handset I using for testing and that did the trick. (Didn't think there was anything in them to go wrong).