Tuesday, March 15, 2011

SEMS 1.4.0 Released

SIP Express Media Server (aka SEMS) version 1.4.0 has been released. SEMS is a high performance media and application server for SIP based VoIP networks started at the same research institute with SIP Express Router (SER), thus having same origins as Kamailio as well as sharing several developers. SEMS interoperability with Kamailio is therefore guaranteed, being the first option for a SIP B2BUA whenever is required in a Kamailio deployment.

This release of SEMS features a powerful Session Border Controller (SBC) module. From completely transparent B2BUA to customized URI/From/To, strictly filtered (messages, headers, codecs) with RTP anchoring, Session Timer enforcement, prepaid and call timer, the SBC facilitates interconnect and core routing in a simple and secure way. Thanks to the new multihoming support, SEMS can now be employed at the border of the networks.

This addition also allows to overcome the bottleneck of one NIC – giving the possibility to fully exploit SEMS’ great performance. In the app development area, the DSM language has matured to become a viable candidate also for implementing complex application logic, thanks to language constructs like for, if and functions. SEMS can be downloaded in source from its ftp site at:

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