I can't see what looks like a normal NTE5 can be correctly 'servicing' two phone lines?
Most phone lines to a residential property come in TWO pairs within one cable to permit TWO phone lines. Most properties only USE ONE pair for a singe phone line. Some, like myself, use BOTH pairs for TWO lines.
I would suggest the OP has the following:
- Both pairs comes to the master socket in question.
- One pair feeds this master socket as Line 1.
- The 2nd pair passes thro' the back of this master socket to elsewhere in the house.
- Also an extension to Line 1 passes out of this master socket (from its front faceplate if wired correctly) to further slave sockets of Line 1.
- The 2nd pair reaches another master socket, for line 2.
- An extension to Line 2 passes out of this master socket to further slave sockets of Line 2.
Because the are 2 phone lines (& #s) there must be a 2nd master socket, even if nowt is plugged into it.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU BB => 2010: Orange 16 Meg LLU BB