gec.gif (1164 bytes)GEC
MT 6101 - MT 6216, IT 4102 - IT 4204
TEL/1J - TEL/11J & TEL/19J - TEL23J


In 1955 GEC decided to renumber all their telephones with the prefix TEL.  The 1946 numbered MT 6101 - MT 6216 and IT 4102 - IT 4204 range, which were the original catalogue numbers for the Junior Gecophone were part of this renumbering.  Please see the table below for more information.

THE GECOPHONE JUNIOR TELEPHONE

Direct Working
This is the simplest arrangement in which one Gecophone Junior telephone is linked directly with another by a comparatively short line. Manager to Secretary, Stores to Records, Lounge to Kitchen, are a few obvious applications.

Battery Call
Three Gecophone Junior telephones can be linked through a simple switch for A to call B or C, B or C to call A and for A to switch B and C through to each other. The switch connects a bell at station A to the disengaged line.

A number of this type of set can be connected to a battery-call switch board for an operator to establish interconnections.

For Apartment Flats
The Gecophone Junior telephone is ideal for flats. With a telephone in each flat and a reply panel in the hall, tenants may call the porter, who, if they wish, can connect them to manager, kitchen, garage, etc. Thus at low cost the standard of service can be raised considerably.

Reply and Call (for loudspeaking intercom system)
In a G.E.C. pushbutton intercommunication system, the secretary to an executive may not require intercommunication with all parties on the system and will therefore not be provided with the usual pushbutton telephone. The provision of a Gecophone Junior telephone, however, allows the secretary to have direct calls to and from the executive, who may use his loudspeaking telephone.

Six Line Intercommunication
Up to six instruments each with five push buttons can be linked together for direct communication, any one with any other, at the touch of a button.  The scheme allows one, two or three conversations at a time to take place.

Multi-core cable links all telephones and the maximum permissible total length cabling length is 400 yards (366 Metres).

BUSINESS PREMISES
The Gecophone Junior Telephone provides internal communication in various forms to aid the smooth running of any organisation, large or small, at low initial cost and with negligible maintenance charges:

For the small business it can provide all the internal communication necessary.  For the larger business, it is an invaluable auxiliary to the main internal system, giving immediate and separate communication between parties requiring frequent converse with each other. A call on the main system can be held whilst any required information is instantly obtained from another department over the Gecophone Junior system.

PRIVATE RESIDENCES
The convenience of owner, guests and servants can be enormously increased by a simple telephone system. The Gecophone junior system brings all rooms virtually close together at the press of a button, and its styling makes it an asset to almost any surroundings.

All calls are signalled by a pleasant note on a buzzer

Mounts on Table or Wall
The telephone is designed to mount on table or wall, the cradle being specially shaped to hold the handset in either position. The table pattern instrument is connected by a flexible cord to a terminal strip for the line wires. For wall-mounting, the line wires are run directly into the telephone and a different escutcheon is fitted.

Line Wires
Two line wires run to each telephone, except in the intercommunication system (nine wire multi-core cable) and the reply-and-call system (seven-wire multi-core cable).

Batteries
Gecophone Junior sets of the direct working, battery-call and push button intercommunication types operate on a battery supply from dry cells.  6 volts DC (1.5 volt for speech and 4.5 volts for calling/ringing).

An alternative power supply for the pushbutton system can be derived from A.C. mains unit Cat. No. SUl30l, which operates from a 100 or 200/250-volt mains supply.

The model for apartment flats and the reply-and-call type draw their supplies from the system with which they are associated.

Simple to Install: Negligible Running Cost
Plastics, staybrite steel, silicon aluminium, and twin silver contacts promote long service life. For the tropics, special finishes give added resistance to adverse climatic conditions.

Operation
To make a call, lift handset and depress appropriate button.  Button will remain latched until handset is replaced at the end of the call.

MT 6113 or TEL/5J/RTS or TEL/19J/RTS
Reply and call telephone
Black table model with one call button
IT 6114 or TEL/5J/RWS
Reply and Call telephone
Ivory wall mounted telephone with one press button
IT 4201 or TEL/8J/ITT or TEL/22J/ITT
6 station intercom phone
IT 4104 or TEL/7J/IWS
6 station intercom telephone


Catalogue Numbers

Type Standard Tropical

Notes

Table Wall Table Wall
Black Ivory Black Ivory Black Ivory Black Ivory
Direct Working MT 6101 MT 6102 MT 6103 MT 6104 MT 6201 MT 6202 MT 6203 MT 6204 3v battery at each telephone for 10-ohm line loop. Extra cells for longer lines.
Battery
Call
MT 6105 MT 6106 MT 6107 MT 6108 MT 6205 MT 6206 MT 6207 MT 6208 4.5V battery at each telephone for 20-ohm line loop. Extra cells for longer line. Used with Extension Switch Cat. No. ES1101 (Std.) ES1201 (Trop.) and any DC bell, or with Switchboard SS3101 (Std.), SS3201 (Trop.)
For
Apartment
Flats
MT 6109 MT 6110 MT 6111 MT 6112 MT 6209 MT 6210 MT 6211 MT 6212 Used with Switchboard Cat. No. SS2101 (Standard) SS2201 (Tropical)
Reply and Call
(Loudspeaking
- Intercom)
MT 61 13 MT 61 14 MT 6115 MT 6116 MT 6213 MT 6214 MT 6215 MT 6216 Used with Intercom Telephones Cat. Non. IT1101 and IT1102 (Std.) and IT1201 and IT1202 (Tropical).
Pushbutton Intercom IT 4101 IT 4102 IT 4103 IT 4104 IT 4201 IT  4202 IT 4203 IT 4204 Minimum of five 1.5-volt dry cells, or AC mains unit Cat. No. SU1301.

Taken from the GEC Catalogue Leaflet MTL 1A

Catalogue Number Conversion Table

Pre 1955
Leaflet MTL 1A
1955  Post 1955
Leaflet MTL 1E
MT 6101 TEL/1J/DTS/1 TEL/23J/DTS/1
MT 6102 TEL/1J/DTS/1/IVORY  
MT 6103 TEL/1J/DWS/1 TEL/23J/DWS/1
MT 6104 TEL/1J/DWS/1/IVORY  
MT 6201 TEL/2J/DTT/ TEL/24J/DTT
MT 6202 TEL/2J/DTT/IVORY  
MT 6203 TEL/2J/DWT/ TEL/24J/DWT
MT 6204 TEL/2J/DWT/IVORY  
MT 6105 TEL/3J/BTS/1 TEL/3J/BTS/1
MT 6106 TEL/3J/BTS/1/IVORY  
MT 6107 TEL/3J/BWS/1 TEL/3J/BWS/1
MT 6108 TEL/3J/BWS/1/IVORY  
MT 6205 TEL/4J/BTT/ TEL/4J/BTT
MT 6206 TEL/4J/BTT/IVORY  
MT 6207 TEL/4J/BWT/ TEL/4J/BWT
MT 6208 TEL/4J/BWT/IVORY  
MT 6109 TEL/9J/FTS/1 TEL/9J/FTS/1 
MT 6110 TEL/9J/FTS/1/IVORY  
MT 6111 TEL/9J/FWS/1 TEL/9J/FWS/1 
MT 6112 TEL/9J/FWS/1/IVORY  
MT 6209 TEL/10J/FTT/ TEL/10J/FTT
MT 6210 TEL/10J/FTT/IVORY  
MT 6211 TEL/10J/FWT/ TEL/10J/FWT
MT 6212 TEL/10J/FWT/IVORY  
MT 6113 TEL/5J/RTS/ TEL/19J/RTS  
MT 6114 TEL/5J/RTS/IVORY  
MT 6115 TEL/5J/RWS/ TEL/19J/RWS
MT 6116 TEL/5J/RWS/IVORY  
MT 6213 TEL/6J/RTT/ TEL/20J/RTT
MT 6214 TEL/6J/RTT/IVORY  
MT 6215 TEL/6J/RWT/ TEL/20J/RWT
MT 6216 TEL/6J/RWT/IVORY  
IT 4101 TEL/7J/ITS/1 TEL/21J/ITS/1 
IT 4102 TEL/7J/ITS/1/IVORY  
IT 4103 TEL/7J/IWS/1 TEL/21J/IWS/1 
IT 4104 TEL/7J/IWS/1/IVORY  
IT 4201 TEL/8J/ITT/ TEL/22J/ITT
IT 4202 TEL/8J/ITT/IVORY  
IT 4203 TEL/8J/IWT/ TEL/22J/IWT
IT 4204 TEL/8J/IWT/IVORY  


In the GEC MTL 1E catalogue the numbers shown are for the black instruments only.  When ivory instruments were required, you had to quote the word IVORY after the Catalogue Number, for example, TEL/23J/DTSJ1/IVORY.

The maximum permissible total length is 400 yards (366 metres).

TEL/19J AND TEL/20J are used with TEL/11D/LTS, TEL/13D/LTS, TEL/12D/LTT and TEL/14D/LTT.
See Cat. Leaflet ITL 3.

Click here for more information on the Reliance TEL/23J/BTS and TEL/23J/DWS

Battery Call Junior Telephones supersede the K7805. For wiring see the K7805 page as they are wired the same.


Additional Pictures

MT6107


Wiring Details

The wiring diagram below is for the 5 button Intercommunication version.  This model can have 6 telephones connected in a system.  At each telephone connect the HOME line wire to terminal 6 (shown as dotted lines).  Connect line wire 6 to spare terminal at each telephone i.e. Terminal 1 at telephone 1, terminal 2 at telephone 2 etc.  For a 5 telephone system omit all the dotted connections.

The talking battery is 3 volts DC and the ringing battery is 4.5 volts DC.  Install the batteries centrally.


 
 
BACK Home page GEC Main Menu Search the Site Glossary of Telecom Terminology GEC Telephone Quick Find All Telephone Systems

Last revised: October 18, 2016

FM2