[Gllug] ADSL problem

[Chris Bell]

On Sun 27 Feb, Dylan wrote:
> 

> 
> There is a small amount of circuitry in the "master socket" (the one 
> directly connected to the exchange) on your phone line. This 
> "termination" completes the electronic circuitry of the phone line (in 
> very general and simplified terms.) Extension sockets are daisy-chained 
> to the local side - you can plug in a splitter and extension lead, or 
> split the connection inside the master box, it doesn't matter which.
> 
> When you plug a microfilter into the phone jack the filtering happens on 
> *your* side of the termination. In the solwise faceplate, the filtering 
> happens on the BT side of the termination. This means the ADSL signal 
> never reaches your telephone socket, whereas with the plug in filter it 
> does.
> 
   The original spark gap and a terminating resistor are left inside the
rear section of the master box, but the original capacitor which would
normally provide the third "ringer" connection is not used, and is replaced
by a similar capacitor on the local side of the filter. Any local telephone
extensions fitted to either front or back sides of the front panel will be
connected to the local side of the filter.

> If an extension is wired into the box, it can be wired to suitable 
> connectors on the new faceplate.
> 
> You should be aware that you MAY be in breach of BT's T&Cs if you 
> replace the faceplate on the master socket. *make sure you do it 
> correctly*
> 
> Dylan

   The original faceplate is designed to be removable by either the customer
or BT, and the customer is always responsible for anything connected to the
local side of the master box. That is the reason for doing it this way, and
making it easy for testing the incoming line without unknown problems caused
by faulty local wiring. BT will charge callout fees if any fault is reported
and it turns out to be due to local problems for which they are not
responsible.

-- 
Chris Bell

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