[DJSADERS]

one issue i had once as a escalation was a faulty telephone line, similar to this. basically the installer had connected to a BT extension (which is all fine and dandy) but didnt disconnect the main BT feed, so all was working until BT upgraded the cab, and re connecting his wire, which had power coming down both the VM and BT wire... as you can imagine VM's telephone exchange (e-side) didnt like this too much