Bakelite
wall
telephone for use on shared service lines, with provision for three
buttons. It is used with Adaptors Shared Service No. 1 & 2.Bakelite
wall
telephone for use on shared service lines, with provision for three
buttons. It is used with Adaptors Shared Service No. 1 & 2.
It is the wall equivalent of Telephone No's 312, 314, 328 and 330.
Telephone No. 321F supplied by British Ericsson as their
Model No. N1075.
Telephone No. 321CB supplied by British Ericsson as their
Model
No. N1423A1.
Circuit diagram N421.
Click here for the circuit diagram - Web users - CD users
History, Technical and General Information on 300 type telephones
Click here for Button labels - Web users - CD users
Keys for use in 300 type Wall and Table Telephones
How to wire your Telephone No. 321 to make it work on Plug and Socket
| BACK | Home page | BT/GPO Telephones | A - Z Index | Glossary of Telecom Terminology | Quick Find | All Telephone Systems |
FM