TELEPHONE No. 31
Wall mounted house telephone with Trembler bell (DC) and a single press button.

Used in connection with up to four other Telephone No. 31's and a Telephone No. 33 or 35 to make a 5 or 10 extension house system.

The press button calls the main telephone only.

Uses a Telephone No. 30 as the handset.

4 terminal.

Details otherwise as for Telephone No. 29.

Made obsolete in 1947.

Circuit Diagram - N131.

System wiring diagram - N133.

Information on all House telephone systems

 


 
 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: November 21, 2021

FM