gec.gif (1164 bytes)GEC No's 200, 201
and 203



Cat. No. 75 shown above

GEC TELEPHONE TELEPHONE SCHEMES

The GEC Extension Schemes are generally based on the Gecophone No. 75.  Special phones that have switches and ringing devices have designed and by use of these phones, GEC designed 18 extension schemes around them.

The schemes and phones are discussed in depth in the following documents:-

GEC Current Comments Volume 8 - No.1 1938 and GEC Current Comments Volume 9 - No.2 1939.


Extension Telephones

Catalogue Number Function

Click on picture to enlarge

200 Switching telephone, with DC buzzer and key to call one extension.
200A Switching telephone, with DC buzzer and AC ringer.
 
 
200B Switching telephone that can connect to two exchange lines.  This telephone also has two DC buzzers so that two telephones can call it.
 
 
200C Switching telephone that can connect to two exchange lines.  This telephone also has two DC buzzers so that two telephones can call it.  Master answering point with secrecy.
 
 
200K Switching telephone that can connect to two exchange lines.  One magneto bell.  No buzzers or keys.
 
 
201 Switching telephone with Magneto bell, DC buzzer and key to call master extension.
203A Gecophone with Magneto bell and bell on/off switch.
 
 
203B Gecophone with Magneto bell and two switches for calling two extension telephones (203C).
203C Gecophone with DC buzzer.
 
 
203D Gecophone with Magneto bell and one switch for calling another telephone.
 
 
203E Gecophone with CD buzzer and one switch for calling another telephone.
 
 

 

 

 

Taken from the GEC Telephones and Switchboards (Manual and Automatic) Catalogue No. 11 (Circa 1936)

 
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Last revised: August 05, 2012

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