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An introduction to Monitoring Fundamentals strictly from the perspective of telecom network alarm management.

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Remote Telemetry Units (RTUs) For Small Sites

Do you have a small remote site with just a few remote monitoring necessities? Don't spend your budget on more than what you really need, buy a light-capacity RTU instead.

NetGuardian 216 G3

  • 16 discrete alarms, 2-8 analog inputs, 2 control relays and 1 terminal server port.
  • Interfaces: RJ45 10BaseT Ethernet port, 50-pin alarm input connector, 4-pin alarm input connector, DB9 RS-232 terminal server port, DB9 craft port.
  • Power Input: -48VDC (-40 to -70 VDC), dual -48VDC inputs (optional), 9 VDC from 110 VAC wall transformer (optional).
  • Operating Temperature: 32 to 140 degrees F (0 to 60 degrees C).
  • Mounting: 19" or 23" rack.
NetGuardian 216 G3


Tempdefender RTU
  • 8 discrete alarms, 4 analog inputs (up to 32 sensors via daisy chaining), 3 control relays.
  • Interfaces: 1 RJ45 10/100BaseT Ethernet port, 1 USB front-panel craft port, 1-4 RJ11 connector(s) for D-Wire Sensor network (optional).
  • Power Input: -48VDC (-36 to -72VDC).
  • Operating Temperature: 32 to 140 degrees F (0 to 60 degrees C).
  • Mounting: 19" or 23" rack or wall mount.

NetGuardian DIN

  • 8 discrete alarms.
  • Supports up to 15 D-Wire sensors.
  • 1 temperature analog channel.
  • Power over Ethernet technology.
  • DIN or wall mountable.
NetGuardian DIN

Need more capacity? Take a look at our RTUs for medium sites or for large sites.