ITI is another imprint found on 300 type telephones; it stands for Indian Telephone
Industries, a company established in 1948 with help from ATE. Tooling for the Telephone No. 332 was exported to India and is/was used
to produce these telephones (the mouldings look rather rough
All the components are fixed to the base plate. There are two air vents in
the base and the feet are press fit. The terminal strip is not numbered as
expected - it is numbered in a circular manner, starting lower right and
base markings for an Indian example are DJL 11044-A8. Manufactured by Indian Telephone
Industries. Bangalore B
The Handset will
most probably have ITI stamped centrally on the handle.
The picture below
gives a good indication of the colour range available:-
Top row - Mushroom,
Peach, Powder Pink, Ivory.
Bottom row - Red, Light Green, Powder Blue, Black.
The ITI dial is based on the ATM No. 24C dial and therefore the finger stop will
always be some distance from the digit 0.
|Indian Dial - Front
||Indian Dial - Rear
Conversion Information for Plug and Socket working in the UK
This UK conversion information refers to the ITI 332 with 13 terminals and
the large cylindrical capacitor. Converted phones should not be connected to any network provider in the
UK. The old line cord is discarded and a new style line cord with plug one
end and spade terminals the other
- Remove the existing line cord from terminals 6 & 8.
- Remove the metal link between terminals 5 and 6.
- Insert a 3.3k resistor between terminals 5 and 6.
- Link terminals 8 and 9 together.
- Check that terminals 11 and 12 are linked.
- Connect the red of the new line cord to terminal 8.
- Connect the white of the new line cord to terminal 6.
- Disconnect the orange wire from the capacitor.
- Connect the orange wire to the new blue line cord spade and insulate.
- Insulate the green wire of the new line cord - it is not connected to
- Connect a rectifier element across terminals 1 and 2.
This is the circuit diagram of the above phone
|ITI 332 Base Plate
Note the two
vents and push fit rubber feet
|ITI 332 Internal view
capacitor may be replaced by a small oblong capacitor. The rubber
fixings are left in situ. The circuit may also be different the
Beware - The terminals on the connection plate number 1 to
13, starting lower right to left and then top left to right. See below.
|This set is a late reproduction and the imprint
on Handset stands out and is not recessed
General information on GPO 300 type telephones
Adjustment of Magneto bells
Labels that fit in the sliding tray
Identifying a reproduction and collectors information