Ixia VQM01XM Voice Quality Resource Module Real Time PESQ

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IXIA VQM01XM Voice Quality Resource Module Real Time PESQ

Real-Time, Full-Reference Quality of Voice Measurement
PESQ (perceptual evaluation of speech quality) is an objective quality of voice measurement method that predicts
the results of subjective listening tests, and is defined by ITU-T standard P.862. It is a full-reference method of
comparing the received audio signal (degraded) to the reference signal (as injected into the system). The PESQ
algorithm requires high processing power to access audio signals and perform in depth signal analyzes.
Ixia’s VQM0001 is an XM form factor resource module with enough processing and memory capabilities to
measure PESQ on up to 300 RTP streams. 
The VQM0001 analyzes RTP audio streams from one or more application load module ports in the same chassis.
Multiple resource modules can also be mounted in the same chassis and used in a single test. 
The VQM0001
module has no external interfaces — it communicates with the application load module through the chassis
backplane. 
The VQM0001 enables PESQ measurement using IxLoad VoIP Peer RTP over any VoIP signaling protocol used
to establish peer-to-peer calls.
Specifications

Feature

Details

Module

VQM0001

Performances

300 RTP streams analyzed real time

Codec support

G.711Alaw and mLaw
G.723.1 1.5kbps and 6.3kbps
G.726 16kbps, 24kbps, 32kbps and 40kbps G.729A,
B and AB
AMR-NB

Statistics

Instantaneous PESQ LE (listening effort) and LQ (listening
quality):
Min, Avg, Max – the minimum, average and maximum
values per all streams tacking in consideration only the last calculated
value
Overall PESQ LE and LQ:
Min, Avg, Max – the minimum, average and maximum
values per all streams from the beginning of test execution
Overall P.56 Active Level, Activity Factor, Peak
Level and Noise Level
Min, Avg, Max – the minimum, average and maximum
values per all streams from the beginning of test execution
PESQ distribution; LE and LQ
distributions:
No. of Channels with PESQ between -5 and 1 No.
of Channels with PESQ between 1 and 2 No. of Channels with PESQ between 2 and
3 No. of Channels with PESQ between 3 and 4 No. of Channels with PESQ between
4 and 4.5 PESQ LE and LQ per stream
Current: the last value of PESQ since the start
of the call
Min, Avg, Max – the minimum, average and maximum
values per call since the start of the call.

Operating Temperature Range

41°F to 86°F (5°C to 30°C), ambient air1

 

1 When used in an XM2
or XM12 chassis

 

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Weight	13.0000 lbs
Dimensions	20 × 14 × 6 in
Brand	Ixia
Condition	Used
Condition Description	*** 60 DAY MONEY BACK GUARANTEE ***
MODEL	IXIA VQM01XM
MPN	VQM01XM