Voice feature testing for NGNs gets an upgrade

8th March 2016
Posted By : Mick Elliott
Voice feature testing for NGNs gets an upgrade

Enhanced Voice Feature Testing Application for Next Generation Networks (NGNs) has been announced by GL Communications. NGNs freely offer advanced voice features that cost extra when provided by legacy circuit switched PSTN landlines. In future, the residence architecture for voice is more likely to be SIP based WiFi phones or 4G/5G phones with higher quality audio.

In either case, voice feature testing is extremely important. Since these software-based services are frequently enhanced, changed, or deleted, the features can be prone to "upgrade issues". Thus automated testing tools for regression and advanced feature testing can be of great value.

NGN advanced voice features are similar to but more sophisticated than CLASS (Custom Local Area Signalling Service) features PSTNs offer. These features include three way calling, call waiting, call hold, caller id, call waiting with caller id among others.

In many cases, these features involve detection and generation of tones and dual tones with varying cadences. Capability for testing higher quality voice (any codec support), inband and out-of-band digit transmission, and DSP are just some necessary functions of a test tool used for testing NGNs.

To test NGN voice features, in both residence and enterprise, GL has introduced a library of functional capabilities within its standard emulation software platform called MAPS, or Message Automation and Protocol Simulation. MAPS is a versatile telecommunications protocol emulator. 

MAPS APS and MAPS SIP are the specific MAPS products that provide functional capabilities to test and verify voice features of NGNs.

In addition to these, GL’s voice, video, and data quality probe, VQuad Probe, extends the ability to perform detail QoS measurements and reporting and it supports multiple physical interfaces for connecting to practically any wired or wireless network while automatically performing voice, video, and data testing. 

These test tools can be easily integrated with "drag and drop" tools such as TedstShell or scripting languages such as Python, TCL, VBA, Java. Users can create compliance test cases to perform simple to complex voice features testing on their network environment.

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