VQmon/EP detects packet loss and jitter buffer discard events, extracts key information from DSP software, and produces real-time call quality scores and diagnostic data. VQmon/EP is widely used in the industry and has been integrated into the products of a number of equipment manufacturers including Audiocodes, Global IP Solutions, Nortel, and Texas Instruments. Other leading DSP software vendors work closely with Telchemy to ensure that integration of VQmon with codec and jitter buffer software is seamless.

VQmon generates listening and conversational quality MOS scores and R factors and a wide range of diagnostic data, making these available through an API as raw metrics, RTCP XR, and SIP QoS Report payloads. VQmon is based on the ITU E Model, with many extensions that improve accuracy by calculating the impact of time-varying network conditions, wideband codecs, orthogonal impairments and signal-related parameters. VQmon/EP has been tested for compliance with ITU-T P.564.

• Listening and Conversational Quality MOS scores (MOS-LQ, MOS-CQ)
• Listening and Conversational Quality R factors (R-LQ, R-CQ)
• Burst and Gap Call Quality Scores (R-Gap, R-Burst)
• Narrowband and Wideband R-factor and MOS Scores
• Degradation factors - % degradation due to loss, discard, delay, codec, etc.

• Burst and Gap Loss/Discard Statistics
• Supports VoIP, TDM, and hybrid TDM/VoIP applications
• Support for packet, frame, and time-based jitter buffers
• Support for a wide range of ITU, cellular, industry-standard, and proprietary codecs
• Cumulative and Interval Metrics

VQmon provides real-time call quality thresholding, supporting either alert generation or automatic configuration.

For more information, see the VQmon/EP Product Brochure or contact us.

Information on VQmon accuracy