BT Extension

RJLewisElec · May 1, 2015

Hi guys,

First post on here, so apologies if this is in the wrong place!

Tomorrow I need to install a BT Slave socket from the master, which isn't an issue, but as it's a very large house it will be a good 40 to 45 meter run between the two. Will this be acceptable? Will this still work at this distance? If not what are the other options available?

Many thanks in advance!

tazz · May 1, 2015

40-45m should be fine.....if any issues with signal, install another master.

davesparks · May 1, 2015

I've never had a problem with running by cable for longer distances than that.

If you think about it the same sort of cable could be travelling hundreds of metres to get from the exchange to the property in the first place, so a few extra metres in the house won't hurt.

davesparks · May 1, 2015

tazz said:
40-45m should be fine.....if any issues with signal, install another master.

Will another master point help? I thought the master point only created the 'ring' signal and didn't do anything to the actual signal?

7029 dave · May 1, 2015

No problem, regens all the way.

sparkdog · May 2, 2015

Got a 100 metre extension to my workshop,works fine.

soms · Jan 18, 2017

davesparks said:
Will another master point help? I thought the master point only created the 'ring' signal and didn't do anything to the actual signal?

This is correct. The master socket contains ring capacitor for ring circuit (hardly used now, most modern phones are 2-wire are generate their own ring signals) and test resistor.

Use good quality twisted pair cable and keep away from mains cables and other sources of EMI where possible or if you have ADSL and the extension is unfiltered your sync speed/connection reliability might suffer.
More info. on broadband issues and extension wiring here ::. Kitz - DSL Broadband Information .:: - http://www.kitz.co.uk/adsl/index.htm if relevant/of interest.