|
|
|
| Special fire telephone used in exchange buildings | This is the later model called the Mk 4 |
|
|
|
| Special fire telephone used in exchange buildings | This is the later model called the Mk 4 |
The Mk 4 version consisted of a Telephone No. 232 mounted on a Bellset which in turn is mounted on a wooden box that houses batteries and a hand generator. The hand generator is locked by means of a releasable bar.
Circuit diagram N181.
Click here for the circuit diagram - Web users - CD users
Picture is a Mk4 - looking into the unit with the lid open
| BACK | Home page | BT/GPO Telephones | A - Z Index | Glossary of Telecom Terminology | Quick Find | All Telephone Systems |
FM
