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Radio Relay Equiment - this page is a stub

The RRS-7 is a single-channel radio relay system for the transmission of a single telephone channel (300-3400 Hz). It is used to extend two- and four-wire telephone lines wirelessly. It can be connected to automatic and conductor-type telephone sets.

See Jane's 1988, p. 245.

  • Frequency range: 235-270 MHz
  • 2 x 1000 duplex channels with 25 kHz channel spacing
  • Power output: 500 mW
  • Mode: F2E with ±10.5 kHz maximum deviation
  • Power supply: 12V DC, NiCd battery 7Ah
  • Power consumption: 3W (standby), 7W (duplex operation)
  • Battery life: 25-50 hours
  • Antenna: rod Yagi (+5.5dB), mast 6 m
  • Manufacturer: Iskra, Lubljana
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