Wall mounting telephone
Many situations arise where either space is at a premium, or it is not convenient to have a telephone on a table. At times like these, the GEC741 is the solution. It can be mounted on wall, pillar or stanchion and protrudes only 11 cm (4 in). The handset rests at the top of the telephone where it is least likely to be knocked by passers by. The dial is at the exact angle for easy reading when the telephone is fixed at shoulder height. An off-hook position is provided so that the handset may be parked while the user is referring to documents, for example.
The GEC741 has the same performance, and is based on the same tradition of reliability, as the companion table telephone - GEC746. The printed circuit, ringer, dial and handset are the same: the only differences are the slim-line case, the main internal frame and the cradle-switch linkage.
The telephone is available in the popular colours of dual-grey, black, and ivory, and its smooth stylish exterior does not harbour dust. The plastic used for the case and handset is virtually impervious to scratching and staining.
The dial has a clear plastic finger plate so that the numbers beneath it are always visible and the black figures are printed on an antique-silver background for greatest clarity : both features help to reduce dialling errors.
All the operating arrangements offered for the GEC746 are available for the wall telephone - shared service, automatic, C.B. manual working, operator-recall, call back and transfer - also up to 4 buttons, with interlocking action, can be fitted to give the facilities of the GEC710 and GEC740 switching-telephone systems.
Case and handset moulded in ABS high-impact plastic, dual grey (the handset, cord and dial surround are the darker tone), black, and ivory. The case can be removed completely for maintenance.
PVC covered cadmium-tinsel-conductor cord. Held in position by grommets which relieve conductors of any stresses.
Handset cord, coiled;- 250 mm (10 in) unextended; 1700 mm (68 in) extended.
Characters printed black on antique-silver background beneath clear plastic finger plate. Trigger type and self-compensating action. Projects through self-centring ring on case. No appreciable variations in pulse ratio after 41 million impulses.
Speed: 10 IPS (20 IPS version available).
Inter-digit pause: 240 ms minimum.
Break-to-make ratio: 2 to 1 (other ratios can be supplied).
Receiver inset: Rocking armature, replaceable capsule; sensitivity, +46 dB relative to 1 dyne/cm squared/mW available power.
Transmitter inset: Carbon granule, replaceable capsule; sensitivity +30 dB relative to 1mV/dyne/cm squared at 20 dynes/cm squared input.
An automatic volume regulator is fitted to limit speech-signal amplitudes on lines shorter than 400 introduces virtually no attenuation on longer lines.
Double-coil ringer; DC resistance 1000 ohms; accepts ringing currents between 16 and 30 Hz; bells, double gong, harmonising tones. Extension bell (BE1100 or BE1200 series) can be provided for noisy surroundings.
Suitable for use in tropical climates. Protected against entry of insects.
Dimensions and Weight
Height, 230 mm (9 in)
Width, 250 mm (10 in) over handset; 140 mm (5.5 in) over case
Depth, 110 mm (4.5 in)
weight: 1.7 kg (3.5 lb)
Handset weight: 230 gm (8 oz).
Taken from a GEC-AEI Telecommunications Ltd publication DLT28A 5mAFS1268 & DLT28C 2mF378 (1968 & 1974)
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Last revised: 19 October, 2008