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Building Telephony Systems with OpenSIPS - Second Edition by Bogdan-Andrei Iancu, Flavio E. Goncalves

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OpenSIPS capabilities

OpenSIPS was originally intended to be a Class 4 SIP switch, but during its evolution along the years, OpenSIPS exceeded the original goal and started to provide Class 5 features. It is not able to offer a complete set of Class 5 features because of being limited to the SIP signaling-related features (that is, call forwarding, call transfer, call pickup, and so on). This limitation comes from the fact that OpenSIPS does not handle media, so it cannot offer media-related features. You can find the list of capabilities offered by OpenSIPS as follows:

Capabilities

Classes

Transport-level capabilities

  • UDP / TCP / TLS / SCTP / WebSockets support
  • IPv4 and IPv6
  • Multihomed with interface exchange
  • IP blacklists

Endpoint-oriented ...

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