Incoming telephone calls dropped after one ring

["David Gumbrell" <david.gumbrell@xxxxxxxxx>]

Hi

My phones were disconnected/reconnected repeatedly for a few days
whilst the plasterer was working round the master socket. An internal
phone line was cut accidentally. After completion of the work a normal
phone was connected on Monday and worked fine. Monday night I added
some secondaries and they were getting a dialtone which was all I
tested, but this morning I got told that incoming calls get dropped
after the first ring. This is still happening even after I have
disconnected all phones and plugged a single one directly into the BT
NTE5. ADSL and outbound calls still work fine. BT ringback test fails.

Anybody know what fault this is likely to be ?

Cheers

David