BT sockets

[monkee]

BT points can any one guide me on the best results do your have you main router connected to your master point of the home ie the one BT tell you to split into two for testing or can it go any were , should you connect 2, 3 , 4 & 5 or can you get away with 2 ,5 what dose the others do, with the old days yes but do will still need them today! with the number of points should you do one in four for a master if you go in and out daisy chain many thanks

 

[monkee]

Thanks guys for some more info on Tel coms, just yesterday I had to disconnect a phone line off the building ready for demo and was asked to relocate in to the site office no problem. But when I got there the phone wire was cut off ok but which core was connected to A&B would it matter what way round they go, is there some form of test equipment to check or is it just use speed checker on the internet?

 

[UNG]

Line polarity shouldn't matter these days

You can get cheap line polarity testers or an engineers butt phone if you want to check though

 

[telectrix]

test with a VM. 48V .+ is B, - is A.

 

[Octopus]

test with a VM. 48V .+ is B, - is A.

I must be being dim..... again please!

 

[HandySparks]

I must be being dim..... again please!

Each phone 'line' into a property consists of two cores (there may be more cores in the cable to allow for additional lines).

There is a continuous voltage of about 48V DC across the two cores (called 'A' and 'B'). Tel was suggesting the use of a suitable DC voltmeter to check which core was which, the positive being 'B'. The terminals for the incoming line on the back of a master socket should be marked 'A' and 'B'.

When the line is being rung, there will also be a higher, AC, voltage superimposed.

 

[telectrix]

Each phone 'line' into a property consists of two cores (there may be more cores in the cable to allow for additional lines).

There is a continuous voltage of about 48V DC across the two cores (called 'A' and 'B'). Tel was suggesting the use of a suitable DC voltmeter to check which core was which, the positive being 'B'. The terminals for the incoming line on the back of a master socket should be marked 'A' and 'B'.

When the line is being rung, there will also be a higher, AC, voltage superimposed.

exactly what i meant. the ring AC is around 90V i believe.

 

[mole2006]

I thought 3 is still used for the ringing circuit. Telecom companies do not like it if you put to many master jacks as it increases the capacitance and so you should have slave jacks wired from the master with the ringing circuit. Try just connecting 2 and 5 to a slave jack and see if the phone rings.
It can make a difference where and how the filter is wired, I've seen speed increases of over double in some old places where they had plugin filters.

 

[UNG]

I thought 3 is still used for the ringing circuit. Telecom companies do not like it if you put to many master jacks as it increases the capacitance and so you should have slave jacks wired from the master with the ringing circuit. Try just connecting 2 and 5 to a slave jack and see if the phone rings.

3 is no longer connected since DTMF dialling was introduced, master sockets can be used as slaves if the components are removed (surge protector, capacitor and resistor) from the pcb

It can make a difference where and how the filter is wired, I've seen speed increases of over double in some old places where they had plugin filters.

I assume you are referring to the master socket faceplate ADSL filters like the NTE2005 or the newer vDSL filters that are fitted to BT Infinity installations they can and do help improve broadband speed. The vDSL filter is more versatile as it allows both filtered and unfiltered extensions so the router does not have to be located adjacent the master socket


One thing that has not been mentioned is that krone terminals will only take 3 wires so to star wire from the master will need a BT junction box or similar

 

[UKMeterman]

If customers are having problems with slow internet speeds try plugging their router directly into the test socket inside the master socket. Get the customer to do a speed check. Some routers are better than others, I fitted http://www.amazon.co.uk/gp/product/B0031SUB4S at my parents and the speed went from 1Mbit/s to 2Mbit/s over the best part of 3 miles of aluminum cable!

 

[mole2006]

One thing that has not been mentioned is that krone terminals will only take 3 wires so to star wire from the master will need a BT junction box or similar

If there is more then 3 cables it would be better terminating them in a new Krone box and jumper acordingly

 

[UNG]

If there is more then 3 cables it would be better terminating them in a new Krone box and jumper acordingly

I'm sure that's what I said!!!

 

[monkee]

This is great feed back guys on telephones and internet connections broadband speed etc.. is not going away! hints and tips are very useful can save time and money for everyone. were we are we don't have any fibre cable just standard good old copper cable, when installing BT cable I always ask for BT complient cable and I always make sure I install a BT test point the box that splits into two very handy for checking faults, thanks again.