The telephone set (hereinafter -TA) is designed to work with the PBX at the voltage of the station source of direct current 60+12/-6 V or 48+4/-2 V at the resistance of the power bridge equal to 2×(500±50) Ohm or 2×(400±40) Ohm, respectively.
Manual infinitely variable adjustment of the acoustic call signal volume level, programming up to 13 numbers, stepwise adjustment of the reception volume level, desktop-wall version.
TA corresponds to the 2nd class of complexity according to GOST 7153.
TA is designed for operation in closed rooms under the following climatic conditions:
? ambient temperature from 1 to 40°C;
?relative air humidity up to 80 per cent at 25°C;
Atmospheric pressure from 84 to 107 kPa.
Example of TA designation at ordering and in documentation of other products:
Telephone apparatus "Telta-214" RG2.184.162 TU
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