VoIP QOS

VOIP QOS stands for Quality of Service over IP and being able to achieve this is much easier than it once was.  Although advancements have been made with VOIP QOS, in depth research is still needed, specifically in regards to authorization.

VOIP QOS focuses on the quality in which data and voice are sent over the Internet.  Additionally VOIP QOS is about the assurance that low delay and Jitter over IP when it is being used heavily.  This means that VOIP is given priority over other types of traffic and that when QOS is not at its peak performance, or not working altogether, the VOIP is stopped so that it does not travel over a faulty link.

You will find that to support VOIP QOS, there is an application called VOIPMonitor, which will shut down certain portions of the VOIP network anytime the QOS begins to fail.  Whenever VOIP starts to deteriorate, the VOIPMonitor will trigger the VOIP network so that no more VOIP calls are sent to the destination where the problem resides.

Additionally working with VOIP QOS is an ITU-T G.113 standard for measuring quality known as ICPIF.  This particular solution has replaced the old Quantization Distortion Unit (QDU) that was very subjective.  What happens is that Cisco gateways will generate the ICPIF values for every VOIP call.  The calculations are then stored for the call record that resided in the AARNet Billing System.

To give you an idea of the various vendors that provide the VOIP QOS, the technology that guarantees bandwidth availability for calls and enables acceptable and consistent call quality, you can use the following table as an on-going reference:

Vendor Name    Product Name
Acme Packet    Packet Net-Net Session Director
Cisco    QOS Policy ManagerIOS Quality of Service
Ditech Communications    IOS Quality of Service
Edgewater Networks, Inc.    VQoS
Inet Technologies    Spectra2
InterExchange Carrier    IXC QOS Monitor
Kagoor    VoiceFlow
NetScout    nGenuis
NeTrue    NeTrueQoS
NMS Communications    PolicyPoint
Radcom    Omin-Q
Sitara Networks    QoSWorksQoSDirectorQoSArray
Spirent Communications    Voice QualityVOIP Signaling
Telchemy    Vqmon
Viola Networks    NetAlly Service Quality Assurance