Spektr-O telephone set

The telephone set "Spektr-O" with the functions of EuroAON (hereinafter TA), designed to work on open two-wire communication networks and installation in dedicated rooms of the third category with the output of visual information about the name and number of the calling subscriber on the liquid crystal display TA.
TA power supply in talk and standby modes is provided from an automatic telephone exchange with a source of direct current voltage of 60 V±10% through the subscriber line with resistance from 0 to 600 Ohm with the power bridge resistance equal to 2×500 Ohm.
TA is designed for operation in closed heated premises under the following climatic conditions:
- ambient temperature from 5 to 40 °C;
- relative air humidity up to 80 % at 25 °C;
- atmospheric pressure from 84 to 107 kPa (from 630 to 803 mmHg).
The TA is manufactured in table-top and wall-mounted version.
TA mass should not exceed 3.5 kg.
TA service life is 5 years.