How many voice channels can a VoIP system support?

As with a PSTN Blueworx Voice Response telephony configuration, the number of channels available on each pSeries computer or BladeCenter computer depends on the number of adapters installed in the system unit.

Capacity planning for DTNA

Individual core processing speed is no longer relevant for Blueworx Voice Response. The overall system relative performance, or rPerf, is the defining factor in how many channels can be supported. As a guideline, an rPerf of 20 can support a 480-channel Blueworx Voice Response LPAR running speech-enabled VoiceXML applications. See http://www.ibm.com/systems/power/hardware/notices/rperf.html for further information on rPerf.

The use of secure SIP and secure RTP, increases the system performance requirements of Blueworx Voice Response by approximately 30%. As a guideline, a system performance rPerf of 26 can support a 480-channel secure SIP and secure RTP Blueworx Voice Response LPAR running speech-enabled VoiceXML applications.

To minimize CPU impact, consider the following:

For the most recent information on suitable processors and capacity planning for VoIP, contact your Blueworx representative.