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ISO 9001:2008
Electronic Sirens
Early Warning Systems

CMC-4 Operation Panel

CMC 4 control comtel


CMC-4 is a multipurpose HMI device for controlling Comtel’s Early Warning Systems.
CMC 4 can control individual Electronics Sirens or a Group of Sirens providing a lot of features and critical information. 



  • Can activate  Warning or Emergency Signals and pre record Voice Messages.
  • Can perform live voice announcements for Public Addressing with his build in Microphone.
  • Can request Electronic Siren’s Diagnostic test and inform you about the Test results
  • Can control 8 Electronics Sirens and 8 Siren Groups.
  • I-Button support.
  • Provide status information for communication Errors and Siren’s Errors in Horns, Amplifiers, or Batteries.



  • CMC 4 is connected on Electronic Siren network via Comtel’s BUS (RS485).
  • The maximum connection cable length is 1000m for a dedicated RS485 cable.