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Features
•
ITU-T P.861/PSQM
perceptual based measurements
of speech quality
•
PSQM+ perceptual measurements
(PSQM improved for GSM)
•
PSQM/IP™
Further advanced PSQM
improved for VoIP measurement
•
PAMS Perceptual
Analysis/Measurement System
•
Echo measurement
•
Delay measurement
•
Call setup time measurement
•
Level measurement
•
Interfaces to loop start (a/b),
ISDN lines and wireless
•
VoIP interfacing
•
Bulk call generation
telecom version
An example application
of OPERA in a telephone
cyclic quality checks via
to ensure the quality-of-
A fully automated, distributed
according to a scheduled
A
Stand alone loop measurement with OPERA
network environment.
A single stand-alone
Paris
OPERA system runs
compressed
a loop back connection
service (QoS)
London
B
Automated distributed System, off-line data exchange
system of OPERA units
Paris
may monitor the quality
order of measurements
London
PABX
PABX
uncompressed
Telecommunication
Network
PABX
PABX
Berlin
PABX
Telecommunication
Network
PABX
compressed
Data exchange off-line over IP
New York
New York
PABX
Berlin
PABX
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