Fiber-optic communication line (FOCL) modem	Wireless modem
Optical transceivers unit	Input-protector device

Main specifications

• Centralized batch communication network with time division.
• Transmitted information – telecode and voice.
• Information exchange channels:
  • radio (RC);
  • wire by physical lines (WPhL);
  • fiber-optic (FOCL).
• Information transmission rate (channel) Kbit/s:
  • RC – 280;
  • WphL - 140;
  • FOCL – 2048 (duplex);
• Information exchange efficiency Kbit/s:
  • RC – 81,6 (72.0 + 9.6 voice);
  • WphL – 45,6 (36.0 + 9.6 voice);
  • FOCL – 81,6 (72.0 + 9.6 voice);
• Frequency range RC – VHF.
• Communication range – 5-10 km.
• Number of network subscribers – 1-5 (10) within information efficiency.
• Noise immunity measures:
  • fast FH – 3500 hps according to the pseudorandom law in broad band;
  • encoding with error correction;
  • information interleaving for spot jamming suppression.
• Operating temperature range – minus 40°С – plus 55°С.
• Radio channel output power - 100 W in antenna.
• External exchange interface – “Manchester-2". GOST 26765.52-87.
• Consumption no more than 850 W + 27 V DC.
• Dimensions, mm:
  • RC – 340 × 240 × 240;
  • WphL – 340 × 250 × 230;
• Single modem weight no more than (10-12) kg.