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SIP Proxy Testing


An SIP proxy is a key component of a SIP-based network. It is responsible for handling the setting up, negotiating resources for, tearing down and maintaining SIP sessions, and can also act as a registrar or a redirect server.

EXFO's SIP Proxy solution tests various features of the SIP proxy, while carrying out performance, scalability and reliability tests.

Technical information

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Key features

  • 2 560 000 emulated endpoints 
  • 4250 calls per second 
  • 18 000 registrations per second 
  • Response latency characterization for registration and call setup
  • Supported codecs: AMR, ILBC, G.711, G.729, G.721, G.726, G.723, G.722, G.728, EVRC, EVRC-B, GSM-EFR, GSM-FR, GSM-HR, H.263, H.264, DTMF, etc.
  • SIP message definition (valid, invalid and proprietary) using a GUI or text-based editor
  • Call flow creation (valid, invalid and proprietary)
  • Protocol state machine manipulation using a ladder diagram
  • SRTP, IPSec and TLS
  • IKEv1, IKEv2
  • Extensive media analysis: path verification, theft of service, mean opinion score, R-factor, jitter, delay loss, etc.


  • Complete test lifecycle coverage: feature, negative, load, regression, interoperability and scalability testing
  • Security testing capabilities such as protection against theft of service, SIP flood/DoS and rogue media
  • Response latency measurement of the SIP proxy under various network load conditions and different mix of traffic
  • Message flood impact measurement such as DoS floods on the response latency of the SIP proxy

Related Resources

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This paper covers the business pressures that MNOs are facing and the corresponding technology transformations they are implementing in their networks to address those challenges. It also discusses how the different phases of new technology lifecycle require different types of testing, measurement and monitoring platforms during the initial LTE introduction period.

Last updated: 2012-01-13

IP-to-IP Gateway Test Suite

Specification sheets

This IP-to-IP Gateway Test Suite focuses on testing critical functions such as security against theft of service and malicious attacks to ensure the viability of VoIP and IMS services.

Last updated: 2011-09-26

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