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VoIP Monitor Professional
is a cost-effective software tool for non-intrusive assessment of speech quality
and measurement of RTP/RTCP traffic parameters in VoIP networks.
VoIP RTP packets arriving at a media gateway are subject to timing
variations as well as loss and mis-sequencing. VoIP Monitor analyses
the RTP traffic to produce real-time useful statistical
data and predictions of speech quality across a single call or many
calls. A calibration file, tailored to the gateway or VoIP terminal
refines the speech quality prediction and gives a better correlated
Mean Opinion Score (MOS) value than any other monitoring method.
VoIP Monitor Professional is a maintenance and network monitoring
tool designed specifically for operators of public and corporate
VoIP networks, system integrators as well for companies developing
and testing media gateways and other VoIP network components.
VoIP Monitor Professional is a new approach to speech quality
monitoring. With VoIP Monitor Professional, it
is easy to observe the performance of the VoIP Network and to predict
MOS for a particular VoIP call or as an average for a group of VoIP
calls. Based on Malden Electronics' long experience in speech performance
assessment, VoIP Monitor Professional offers these
outstanding features:
- Requires an absolute minimum of configuration: Plug-n-Monitor!
- Low Cost
- Provides all the data needed to ensure efficient VoIP network operation, without needing high-level competence in speech quality assessment.
- Expertly predicts the experience of users by calculating Mean Opinion Score.
- Passive monitoring technique presents no security threat to the network being monitored.
- Call identification and grouping, by IP address and IP address groups.
- Traffic statistics per each call and per call groups.
- Indication of MOS, jitter, packet loss, speech level, measurement duration, codec used, codec settings, number of packets.
- Graphical presentation of quality trends (MOS, jitter, packet loss) for each direction of a call.
- Calibration files to optimise MOS predictions represent the impairments of the particular VoIP telephones and gateways in use.
VoIP Monitor Professional
analyses the Voice over IP traffic by monitoring live RTP/RTCP traffic
streams. The performance of a VoIP transmission network can be characterised
mainly in terms of Packet Loss and Jitter.
Packet loss can degrade speech quality but effective packet loss
concealment can cover up these degradations. Jitter can also affect
speech quality if it exceeds the capacity of the jitter buffer or
the dynamic jitter buffer algorithm is inadequate. The jitter buffers,
codecs and packet loss concealment techniques influence the speech
quality in IP phones and gateways differently and there are wide
variations between brands, models and software versions. For these
reasons it can be misleading to use these RTP/RTCP statistics alone
to predict the speech quality performance of a VoIP connection.
VoIP Monitor Professional can take account of
the influence of codec distortion and inadequacy of a dynamic jitter
buffer or packet loss concealment. This increases the accuracy of
speech quality prediction with better correlation to MOS.
This high accuracy MOS prediction can be performed in real-time on more
than 500 RTP streams or 250 calls at the same time. MOS, jitter
and packet loss trends are presented graphically on the VoIP Monitor
screen. The Diagnostics feature gives additional information about
the percentage impact each parameter has on the degradation of speech
quality as well as indicating where the network problems lie.
VoIP Monitor Professional has been designed for absolute ease of use.
A clearly ordered user interface with Action Panel, Function Tabs and Results Panels supports rapid learning. Starting or stoping
capture, selecting a call to analyse, navigating through results and settings are all intuitive and require virtually no learning time.
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