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Benchmark Test of OpenSER with RTPproxy Download complete test plan and results The purpose of this benchmark test was to determine the call capacity of OpenSER V1.3 and RTPproxy V1.0 running on a single server. The test, designed to replicate a production environment for wholesale VoIP operations, was performed in the TransNexus lab. Test Bed. The host server for OpenSER and RTPproxy was a Dell Precision 490 server with two Intel Xeon 5140 dual core, 2.33 GHz CPUs and 4 GB of RAM. Three CPU cores were disabled for the test. The test was run using just a single CPU core. Multiple SIPp clients directed traffic to OpenSER which queried an OSP server for call routing instructions. The test was designed for each call to require an average of two retries before the call was completed to a SIPp server on the third try. The two-way RTP stream for each call flowed through the RTPproxy. Call Detail Records for each call attempt were sent from OpenSER to the OSP server.
Test Results. OpenSER and RTPproxy, running on a single core of a 2.33 GHz CPU can manage up to 750 simultaneous calls. The chart below plots the test data for CPU utilization as a function of simultaneous calls.
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