Hi
I've got a BT versatility phone system and 1 of the lines isn't working.

When you plug the phone in it says initialising but then comes up with just time date and exit.  The line lights come on when a line is in use but there is no dial tone and you can't get a line.
The line is not disabled or locked in the versatility.

Lectrician.....saw you post somewhere else that you could help with a versatility problem, any chance you could shed some light on mine.  Would be much obliged.

Thanks for the reply.

Yes, sorry I did indeed mean extension.
The featurephone I'm using to test this line works fine on other lines, so the issue is definitely not at that end.

The extensions coming out of our CCU are cabled straight into a patch board for distribution over our ethernet cabling.  I have been plugging my featurephone (via pstn Master converter) straight into the patch board for testing purposes so there is only about 3 feet of cable between it and the ccu.
I also checked that there are 4 pins connected at both ends and all looks ok.  I am pretty certain that this extension has worked in the past so it seems unlikely that the wiring would actually be wrongly placed.
I considered that the wiring might be damaged so tried to reproduce the behaviour using a featurephone on a different line and individually taping over each pin on the connector then pluggin the phone in.  None of the 4 used connections, when individually disconnected, produced the same behaviour as on the faulty line.

Do you think it is likely that my CCU itself is faulty?

thanks again for your help