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SIP Functional and Performance — sipFlex

 

The sipFlex Test Suite is the industry’s most flexible yet easy to use application. It provides unprecedented flexibility and comprehensive test capabilities for characterizing VoIP and IMS networks.

Technical Information

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Key Features

  • 2 048 000 emulated endpoints
  • 4250 calls per second
  • 18 000 registrations per second
  • 1 280 000 watchers/presentities supporting any mix of watchers to presentities (e.g., 16 watchers to 1 presentity)
  • 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
  • Traffic creation consisting of a mixture of features to simulate subscriber behavior
  • Call completion rates simulation with user-response behavior
  • Response latency characterization for registration and call setup by defining key performance indicators implemented in hardware
  • 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.
  • 24 built-in IMS Class and VoIP flows and a flexible editor to create any user-defined flow
  • SRTP, IPSec and TLS
  • IKEv1, IKEv2
  • DNS lookup
  • Router interface emulation
  • Real-time report generation
  • NAT traversal verification capabilities
  • DTMF insertion and extraction testing
  • IMS calls and AKA authentication support 
  • Extensive media analysis including path verification, theft of service, mean opinion score (MOS), perceptual evaluation of speech quality (PESQ), R-factor, jitter, delay, loss, etc.
  • P/S/I-CSCF and HSS testing fixture to terminate IMS registration
  • IMS network cloud emulation consisting of several elements in the IMS network
  • Generation and analysis of MSRP

Applications

  • Complete test lifecycle coverage: feature, negative, load, regression, interoperability and scalability testing for any SIP-based network elements such as SBCs, IMS P/I/S-CSCF, IP centrex servers, persence servers and SIP proxies
  • Security testing capabilities such as protection against theft of service, SIP flood/DoS and rogue media
  • Registration testing including 401, 407, AKA and HTTP digest
  • Response latency measurement under various network load conditions
  • Impact measurement of message flood such as registration and DoS flood on the response latency of the network elements
  • Voice, video and DTMF impairment characterization

The sipFlex Test Suite, the industry’s most flexible yet easy to use application, provides unprecedented flexibility and comprehensive test capabilities for characterizing VoIP and IMS networks. It combines flexibility in message and call flow definition as well as in application creation to perform feature, negative, interoperability, load and scalability testing using a single test application with no need to perform any scripting.

IMS P-CSCF Testing

The P-CSCF serves as the initial point of contact for the subscribers to the IMS network. It performs key functions such as proxying SIP messages from the subscriber to the IMS network, establishing IPSec tunnels between the subscriber equipment and IMS network and the protection of the IMS core against SIP message floods. Since the P-CSCF acts as a conduit for the user interactions with the IMS core, the ability of the IMS core to provide IMS services such as Presence, Voice Calls, IP Centrex service and Conference services can be negatively impacted by the P-CSCF. Therefore exhaustive testing of the P-CSCF is necessary to ensure a reliable IMS network that will be able to provide toll grade quality of service for the various IMS services.

The P-CSCF test solution is focused on testing the key functions of the P-CSCF. It emulates the IMS subscribers supporting IMS AKA and IPSec, and the rest of the IMS core network, which includes the I/S-CSCF and HSS on a single test platform.

Features

  • 1 280 000 emulated endpoints supporting protocol compliant registration refresh using IMS AKA and/or HTTP digest
  • 4250 calls per second
  • 9500 registrations per second with authentication
  • 320 000 IPSec tunnels
  • Characterize the response latency for registration and call setup
  • Codecs supported: AMR, ILBC, G.711, G.729,G.721,G.726,G.723, EVRC, EVRC-B, H.263, H.264, DTMF, etc.
  • Define any SIP message (valid, invalid and proprietary) using a GUI or a text-based editor
  • Create any call flow (valid, invalid and proprietary); manipulate protocol state machine using a ladder diagram
  • S/I-CSCF and HSS test fixture to terminate IMS registration
  • Emulate IMS network cloud consisting of several elements in the IMS network

IMS S/I-CSCF Testing

The S/I-CSCF test solution is focused on testing the key functions of the S/I-CSCF. It emulates the IMS subscribers supporting IMS AKA and IPSec, and the rest of the IMS Core network which includes the IMS core and HSS on a single test platform.

Related Resources

 
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12
 

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

VoIP/IMS Network Infrastructures

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Developing and deploying a wireless or IMS network presents significant challenges for NEMs and NSPs to ensure voice-over-Internet protocol (VoIP) security. This animated diagram presents EXFO’s lab-based test solutions and how they are designed to meet the challenges of wireless, VoIP and IMS network testing.

Last updated: 2011-12-20

sipFlex Test Suite

Specification Sheets

The sipFlex Test Suite provides comprehensive test capabilities for characterizing VoIP and IMS networks; it performs feature, negative, interoperability, load and scalability testing.

Last updated: 2011-09-28

This paper explores how IMS is the solution for NSPs who need an architecture that will enable them to offer value-added services simultaneously, across both the fixed line and mobile accesses.

Last updated: 2011-08-22

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