The BLC-201 Field Telephone is a rugged, lightweight and waterproof analogue telephone set designed according to military requirements and suitable for connection to manual (magneto) or automatic 2-wire switchboards, to a similar telephone or directly to the public telephone network (PSTN).
The telephone electronics, based on DSP technology, uses a high efficiency electronic ring generator to ensure low power consumption and long battery life. The BLC-201 operates in Common Battery (CB), Common Battery Signalling (CBS) and Local Battery (LB) modes, as selected by the user. When operating in LB or CBS modes, the BLC-201 Field Telephone is powered by a pack of four ‘C’ size (IEC-LR14) Ni-MH rechargeable or alkaline battery cells. Batteries are not required in CB mode.
A slim and lightweight military standard handset with push-to-talk switch allows easy operation even by personnel wearing helmets. Silent calls are allowed with extra microphone amplification by selecting ‘whisper’ mode of operation.
| Electrical Specifications | |||
| Connection | Two wire binding posts for connection to line and one binding post for ground connection | ||
| Range | 40 km (LB mode) | ||
| 20 km (CBS mode) | |||
| 12 km (CB mode) | |||
| Return Loss | > 14 dB | ||
| AC impedance at 800 Hz | 600 Ω, typical | ||
| Minimum DC current | 17 mA (CB mode) | ||
| Call detection | 20 Vrms, 15 to 70 Hz, at least 80 ms | ||
| Call signal generation | 45 Vrms, 25 Hz ± 5 Hz, 2 sec, each time the call key is pressed | ||
| DTMF signaling | According to ITU-T Q.23 | ||
| Environmental Specifications | MIL-STD-810F | ||
| Operating temperature | -25 to +70 ºC | ||
| Storage temperature | -40 to +75 ºC | ||
| Humidity | 0 to 95 % | ||
| Waterproof | Method 512.4 | ||
| Shock | Method 516.5 | ||
| Vibration | Method 514.5 | ||
| Physical Specifications | |||
| Dimensions ( W x D x H) | 259 x 148 x 105 mm | ||
| Weight | < 1.2 Kg, without battery | ||
| < 1.5 Kg with battery | |||
| Case color | olive green, RAL 6014 |