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In large systems, high availability (HA) is an important feature. A communications system with more than a few dozen users generally must not have any unexpected outages for basic calling and of course emergency calling. In sipXecs, routing a call depends on the proxy and the registry/redirect service - these are managed as the SIP Router roles.

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Highlights of sipXecs High Availability

  • One large system from the user's perspective
  • Load balancing under normal operating conditions
  • No calls lost in case a server fails
  • Full proxy / registrar redundancy
  • Not dependent on database clustering: uses DNS to distribute registrations and calls across servers (like a Web server farm)
  • Phones can register with either proxy / registrar
  • sipXconfig reports on load distribution
  • Redundant systems can be in different locations or networks (the connection between them must not go through a NAT)
  • Remote process management using the Web UI
  • Simple installation of an HA system using the sipXecs installation ISO image

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