What is a bridge tap?!
January 25th, 2018 12:24 pm

We are seeing an increasing frequency of people posting on various internet forums about bridge taps. This post covers what they are & how you can avoid their pitfalls. 

Bridge taps are unterminated extensions of the telephone line or loop. They can alter the impedance of the local loop, especially at ADSL & vDSL frequencies. With DC (AC when the phone rings!) voltage the bridge tap behaves like an open circuit (so no effect), but with high frequencies (ADSL & vDSL), the loop becomes a transmission line "stub". This impedance mismatch can cause a wide variety of problems, but typically it causes a reflection of data bits from the tap-point back to the point of transmission. This results in bit errors, or in English, your speed will most probably reduce.

So how do we avoid this? The easiest way is to fit a filtered faceplate to the master socket. This will issolate all extensions from the DSL signal so they can no longer affect it (centralised faceplates remove the DSL signa...

Installing a MK4/NTE5C Combined Socket
May 8th, 2017 7:49 am

The following guide covers the NTE5C/VDSL MK4 Combination Socket - available here.

The connections on the MK4/NTE5C are cam lock connectors & do not require a tool. Firstly connect the incoming line connections to the A & B terminals on the REAR of the NTE5C socket (DO NOT connect to the A & B Connections on the MK4!). On some sockets this connector is RED, on later versions it is CLEAR :-

MK4 VDSL/NTE5C Line Connections
Lift up the cam lock lever, push the wires all the way into the connector and firmly push the lever back into position. If you do not have extensions for broadband or telephones then that completes the installation!

If you have extensions for telephones these connect to the terminals marked 2, 3 & 5 on the NTE5C part. On some sockets this connector is BLUE, on later versions it is CLEAR. To access these connections REMOVE the VDSL MK4 part from the NTE5C- push in the side tabs and pull the MK4 away from the NTE5C :-

NTE5C Telephone Extension Connectors
Again insert the wires into the connector a...

Choosing the right cable....
May 4th, 2017 9:27 am

We have a selection of cable available, in this guide we explain what each type is design for.....

CW1308 (https://www.run-it-direct.co.uk/telephone-network-cable/CW1308cable10MW/)

CW1308 is the original specification for twisted pair telephone cable. The pairs are twisted as this cancels out electrical noise which can affect both the voice signal in the way of an audible hum and the broadband signal by way of lowering sync speed. To be true CW1308 specification the conductors MUST be pure copper. There's a lot of cable out there that claims to be CCA (Copper Clad Aluminium) or CCS (Copper Clad Steel-VERY NASTY!!) CW1308 but it simply can't be. CCA & CCS is also terrible for broadband, even a short length can have dire affects on signal quality. CW1308 is available in black or white and is an INDOOR or internal grade cable ONLY. It is available in multiple pair counts, the cable we sell is 2 pair as for most domestic installations that is adequate.

CAT5E (https://www.run-i...

REIN REIN go away!
June 2nd, 2016 3:04 pm
BT REIN Filter

REIN, or Repetitive Electrical Impulse Noise to give it its full & fancy name is one of the biggest bug bears of broadband. In short this is interference on the telephone line that affects the broad band speed &/or stability. It can be caused by numerous things, from nearby transmitters to street lights & flashing Christmas lights!

The good news is there are a couple of devices that can be fitted to try & combat this. First off it the BT 80BRF3 :-


This small device is fitted upstream of the master socket, screw terminals connect to the incoming line & IDC terminals connect to the cable that feeds the master socket. The RF filter cuts out the radio interference which in turn improves broadband speed & stability.

The second device that can fix this problem is the BT VDSL faceplate :-


This is a filtered faceplate that is compatible with ADSL & VDSL...