Ours do that sometimes and the red light flashes as though the phone is in use.  We disconnect the connectors, blow in them to clear any dust/dirt, put them together again and that usually does the trick.  If it's not just a connector issue, one of the tech guys should be able to help.

Good luck,

Dave.

Thanks - I have blown into the connectors, still no joy.

The handset does not seem to recognise the base 🙁.

Have you tried to re-register the handset to the base?

Dave.

"No Signal" means there is no LINE signal coming into the base.

If it was a communication error between handset and base it would read "No Contact".

Hi Dave

I have tried re-registering the handset to base but the display keeps saying ' search base - wait' and a little '/' keeps revolving. When this eventually stops the screen displays 'register base?' again. 

I feel the fault is with the pstn base but I do not know what to check as there are no display lights (for example) to see if it has any power.

Thankyou for your help.

Francis.

Depending on which PSTN base you are using, you can only register either 6 or 8 handsets. If you experience a problems and continually register the handset to the base, you eventually use up all available spaces with "phantom" registrations.

Once you get the base/handset working again, check to see how many handsets the PSTN thinks it has registered and delete any phantom ones.

Opman

Which PSTN do you have - The intelligent base type (line connection to the pyramid charger base), square PSTN or the small rectangular BeoLine?

It sounds as though the PSTN is faulty or lacking power supply...

It's the square Pstn. 

You'll probably need to pop it into your local dealer - where are you?