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Specifically designed
for integration in network analyzers, probes,
firewall routers, ONUs, and VoIP test equipment, VQmon/SA
efficiently analyzes multiple parallel packet
voice streams and provides estimated call quality scores (MOS and R-factor) and detailed diagnostics for
each RTP stream, at the end of each call or at any point during a call.
VQmon/SA is the most widely used and deployed
Voice over IP analysis technology, forming the
core of most of the industry's VoIP probes and
analyzers.
VQmon/SA examines each
voice packet, accurately predicts which packets
would be lost or discarded using a jitter buffer
emulator, measures the distribution of lost
and discarded packets, and produces call quality
scores and diagnostic data. In addition to the
rich set of diagnostic data produced by VQmon/EP,
VQmon/SA produces a range of additional packet-
and jitter-buffer-related statistics. VQmon/SA
supports full RTCP XR VoIP metrics payload decoding
and is able to determine round-trip delay from
either RTCP or RTCP XR. 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). |
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- 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 and MOS Scores
- Degradation factors
- % degradation due to loss, discard, delay,
codec, etc.
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- Burst and Gap Loss/Discard
Statistics
- Lost, Discarded,
Out-of-sequence, Duplicate packet statistics
- PPDV (RFC3550), MAPDV
(G.1020) and Y.1540 Jitter Metrics
- Support for a wide
range of ITU, cellular, industry-standard,
and proprietary codecs
- Cumulative and Interval
Metrics
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