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 over 50 equipment manufacturers and is available in Texas Instruments and Global IP Solutions Voice over IP solutions.

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 an advanced VoIP perceptual quality estimation algorithm that incorporates support for key international standards including ITU-T P.564, ITU-T G.107, ITU-T G.1020, ETSI TS 101 329-5 Annex E and IETF RFC 3611. VQmon incorporates support for time varying IP impairments (typically caused by network congestion) and has been independently shown to provide significantly more accurate and stable metrics than other algorithms such as G.107 (E Model).

• 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.
• Supports RTCP XR and SIP RTCP Summary Reports

• 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
• Complies with or supports ITU-T P.564, G.107, ETSI TS101329-5 Annex E, RFC3611, draft-ietf-sipping-rtcp-summary-06

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