MC-DIRRAC > Off air, Channel selective, Digital TETRA TETRAPOL Repeater


SEE Telecom’s multi-channel digital off-air repeater (MC-DIRRAC) enhances RF coverage in confined areas. The MC-DIRRAC processes up to eight channels, independently, both in frequency and in power, through per channel and per timeslot AGC/ALC functionalities and customizable filtering. Built-in waterproof wall-mounted rack, the MC-DIRRAC can be installed in the harshest environment, indoors or outdoors.
The repeater has two RF connectors, one connected to the antenna pointing toward the base station and the second one is connected to the antenna or radiating cable in tunnel or building. Monitoring and control can be done via SNMP, SCADA or Ethernet using a web browser installed on a PC which gives access to the GUI. This interface contains an easy configuration page. The MC-DIRRAC also has a sum alarm output which can be connected to an external alarm system. An optional GSM modem allows an user to receive alarm and to turn the radio part of the repeater on & off.
The repeater can be ordered with different frequencies, powers, different power supply voltages, with or without battery backup, and with a GSM modem.


  • Coverage enhancement
  • Confined areas: tunnels, buildings, metros, mines, wind turbines, warehouses
  • Outdoor: public safety, border patrol, working areas

Key Features

  • Key features
  • Bi-directional high power
  • 5 or 6.5 MHz bandwidth
  • Up to 8 channels independently processed
  • Customizable filtering
  • AGC/ALC per timeslot
  • Compact size
  • High linearity
  • Monitoring & control via IP


  • Easy installation
  • No near-far effect
  • Large coverage capability
  • Carriers balancing
  • Unwanted carriers notching
  • High density spectrum adapted


  • ASTRID (Belgium)
  • BDBOS (Germany)
  • C2000 (The Netherlands)
  • RENITA (Luxembourg)
  • Abu-Dhabi Police (UAE)