TELEPHONE No's N202328 & N202329
Hand Test Telephone
The Buttinski is a robust hand telephone used in automatic exchanges for call-trace and routine-test purposes. Spade-tag terminations allow it to be readily supplied (or customer adapted) for either plug-in or clip connection to appropriate test points in the exchange equipment.
A press button near the earpiece provides ON/OFF control of the transmitter and also serves to loop the line under test prior to use of the dial.
The end cavities of the handset contain terminal inserts, resistors, receiver and transmitter insets and the dial. This rests back-to-back with the receiver and is retained to the mounting frame by three screws. The transducers fit securely into moulded recesses in the mouthpiece and earcap to form complete units that push-fit into moulded grooves in the handset. Components are specially finished to withstand tropical conditions and PVC-insulated wiring is used throughout.
Overall Dimensions and Weight
Weight 1lb. 14oz (0.85kg)
PUBLICATION No. 7460, 2/76
Last revised: October 08, 2019