We replaced our old B & O phone with a 2nd hand BeoCom 600 with 3 handsets.  As we couldn't delete the previous owners phone numbers, nor rename each phone appropriately,  we followed the reset instructions (dot - 7 - 000-8(for base) .  After which all 3 phones now say 'no signal'.  Thus we can not begin the registration process to link the phones to the base station.

What have we done wrong & how do we fix it please?

Square base or Pyramid base?

Pyramid base

Sorry for the delay in answering.
You must hold down the button between the two brass charging pins for 6 or 7 seconds, until the red light flashes.
This will 'open' the base so the handset can find it.

Andy T.

We have done this  but the phones still say 'no signal'

Try looking at this thread and see if it helps.
Failing that, try doing a search for Beocom 6000 No signal
I'm sure this has been covered in the past

Andy T.

MajikM:

We have done this  but the phones still say 'no signal'

Once the LED on the base station flashes red (after keeping the small button between the charging pins pressed for a few seconds) you need to go into menu 7 of the handset (press DOT and then 7). Here you can re-register the handset.

Alternatively you can also reset the handset which will automatically bring in to asking for registration.
Resetting the handset is very similar to resetting the base station. Press DOT 7 0 0 0 9.

Br,
Burnix