Digital radio relay station "Contact" (DRRS) operate in the frequency range of 7...40 GHz and are designed to organize one broadband radio channel single- and multi-span radio relay links, with bandwidth up to 34 Mbps for telephone, internet or other applications.
    The frequency band DRRS depends on the data throughput DRRS see table

     DRRS "Contact" produce with redundance 1+1 and without redundance.
     With the help of service program it allows remote monitoring and control of all stations multispan radiorelay system through telemetry and remote signaling.
     RRL powering ~ 140...260V (AC voltage) with the ability to connect back-up voltage 24...60V (DC voltage).
     Dynamic allocation of traffic (the resources of any unused E1 automatically transferred via Ethernet) makes it easy to use.
    The company manufactures Converter CAE-110 of 2 independent audio channels of studio quality (no compression) in the digital stream E1 and back. This allows to trasmit from 2 to 32 audio channels through selected DRRS.
    High-speed stantions DRRS 155Mbps are produced in the frequency range 10,7...11,7 GHz with Ethernet bandwidth up to 100Mbps at the interface 100BASE-TX and up to 150Mbps at the interface 1000BASE-T. Modulation mode is QAM64, operating distance is up to 20 km.

• Medium-speed digital radio-relay station of Contact series
• Digital modem Contact 11M.2M16.QAM
• Converter Audio<->E1
  CAE-110
• Multiplexer/demultiplexer of four E1 streams into E2 stream MD-100
• Interface converter
  CI-100E
• Simulator-Tester of Å1, Å2 streams IT-102, IT-108
• High-speed digital radio-relay station of Contact series