Dear Guy,
Many thanks for your input.. My Beocom 6000 PSTN connector is as per your illustration on the left with the white dot & the line connections further apart. The Beoline (113068 GB) RJ11 plugs into a B&O adaptor with the pins close together – 3&4 from your description. Further attempts to use the Beoline direct & via Virgin adaptor have failed.
If Isthatteh beotime looks in again has anyone else fed back to him on success with his sequence?
Many thanks both