REDCOM Sigma is the flagship unified communications (UC) and call control software platform focusing on secure and interoperable communications. The software can function as a stand-alone virtualized Local Session Controller (LSC) or as an adjunct to an existing Enterprise Session Controller (ESC) to deliver advanced voice services such as transcoding and conferencing for red and black networks.


REDCOM Sigma delivers powerful capabilities highly relevant to the government and military, including a robust URI-based call routing engine with full support for the Assured Services Session Initiation Protocol (AS-SIP). The software offers a comprehensive set of UC functions, including VoIP, point-to-point video, XMPP with presence, conferencing, and unified messaging.


REDCOM Sigma has been carefully evaluated for cybersecurity (CS) and interoperability (IO) by JITC and is on the DoDIN Approved Product List.


It is designed to be intuitive and seamless, making it easy for warfighters to get up to speed. With our sophisticated simplicity approach, you can rapidly learn the software and reduce the need for FSR’s and specialists. This improves the tooth-to-tail ratio (T3R) and allows the ability to implement, operate, and maintain technology with the team on-hand.


REDCOM Sigma is scalable from small tactical teams up to strategic levels and can be deployed in a wide variety of applications:

  • Local Session Controller
    • Tactical Field Operations
    • Base Central Office
  • Hosted PBX
  • Command & Control (C2)
  • Unified Communications adjunct to existing switch networks from REDCOM and third party vendors


  • Can be deployed in public, private, and hybrid cloud environments.
  • Supports all major hypervisors or bare metal installations
  • Standards-based design works with a variety of third party phones, soft clients, and gateways
  • Rapid boot time
  • Resiliency to hard shutdown
  • Extremely low SWaP