Phone line not working - no dial tone, weak tone for toner probe 5

[LePivert]

We have wall-mounted (analog) phones in each classroom (I work in a school) meant for emergency calls.

In one room (let's say room X), there is no dial tone.

If I lift the phone in that room off the wall plate and place it on the wall plate in one of the adjoining rooms, it works (dial tone is audible).

If I take the phones from one of the other rooms (that work in those rooms - i.e. have dial tone) and place them on the wall plate in room X, no dial tone.

I've done this over and over again and the result is consistent.

So, I took our toner probe and compared connections.

In the rooms where there is a dial tone, the tone at the punch down block is strong (loud).

The tone from the line going to room X is audible but weak.

I assume there is some connectivity, but not very good, not good enough to obtain a dial tone.

It looks like it must be the line because neither the wall plate or the punched down wires look damaged or put of place.

What can I do next?

 

[norstarboy125]

Before running a new cable I would try using a different pair. I'm assuming this is a 4 pair cable, you have 3 other pairs to try before running a new cable.

Charm City Communications

http://www.charmcitycommunications.com