News & Events

Telchemy Announces VQmon Release 2.0 with RTCP XR Support

Atlanta, GA 4th November 2003 - Telchemy, the leading provider of technology for real time Voice over IP call quality monitoring announced today the release of its VQmon Release 2.0 software. VQmon 2.0 is the first Voice over IP call quality monitoring technology to support the new RFC3611 RTCP XR protocol for QoS reporting. VQmon and RTCP XR provide a powerful combination, ideal for Enterprise IP PBX management or demanding applications such as IP Centrex/ Hosted PBX.

VQmon/EP is integrated into IP Phones and IP Gateways, providing real time monitoring of live calls and reporting call quality through the media path (RTCP XR) or signaling protocols. VQmon/EP measures the statistical distribution of lost and discarded packets, examines delay and CODEC type, extracts information from the endpoint's signal processing software, and applies sophisticated perceptual models to predict the user's opinion of call quality. Conversational and Listening Quality metrics are reported, together with a rich set of supporting diagnostic data to support problem identification.

VQmon/SA provides the core Voice over IP analysis function for many probes, analyzers and SLA monitoring systems. VQmon/SA makes detailed measurements of the IP stream at key points in the packet stream, identifies which packets would be lost or discarded using a unique jitter buffer emulation algorithm, measures the statistical distribution of lost and discarded packets and employs the same powerful call quality analysis algorithms as VQmon/EP in order to produce consistent call quality metrics for endpoint and midpoint. In addition to providing the same comprehensive set of metrics as VQmon/EP, VQmon/SA provides a wealth of jitter buffer related statistics. VQmon/SA is able to automatically interpret RTCP XR reports from IP endpoints, providing instant comparisons between endpoint and midstream measurements to support rapid problem diagnosis.

Key new features of VQmon Release 2.0 include:

  • Generates and interprets RTCP XR messages
  • Incorporates the effects of signal, noise and echo level
  • Calculates round trip delay from RTCP messages
  • Provides a breakdown of the factors contributing to call quality degradation
  • Supports the new Japanese TTC requirements
  • Provide both conversational and listening quality metrics