GEC
MT 6101 - MT 6216, IT 4102 - IT 4204
TEL/1J - TEL/11J & TEL/19J - TEL23J

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.

Introduced circa 1947.

Catalogue Numbers
(1947)

Taken from the GEC Catalogue Leaflet MTL 1A
 

Catalogue Number Conversion Table
(1955)

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

Click here for a GEC Current Comments article

Battery Call Junior Telephones supersede the K7805.

For wiring see the K7805 page as they are wired the same.

Pictures & Additional Information

Note that the handset changed when the models were renumbered and prefixed with TEL. 

MT 6113 Reply and call telephone Black table model with one call button

MT 6103 Direct working telephone Black wall model with one call button

IT 6114 Reply and Call telephone Ivory wall mounted telephone with one press button

IT 4201 6 station intercom phone

TEL/8J/ITT or TEL/22J/ITT 6 station intercom phone

IT 4104 6 station intercom telephone

Additional Pictures

MT6107

IT4103

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.

Last revised: September 23, 2022