Overview |
Main Features |
Waveform/Spectral Viewer
Voice Quality Testing (VQT) Results |
Buyer's Guide
Overview:
Testing on the extreme end-point of a network has become a priority for many people. This method of testing represents what an end user is actually
experiencing.
Voice quality testing within VoIP and PSTN networks is growing, a major concern is testing the VoIP phones and the analog Telephone Adaptors (ATA)
that will be used within the VoIP/PSTN networks. The VoIP phones and ATA's must be free noise and other hindrances that may cause a degraded voice
quality when using this equipment. The GL VQuad™ software combined with GL's Voice Quality Testing (VQT) software permits this desired VQT testing,
of the VoIP equipment, yielding results that include PESQ/PAMS/PSQM+ Mean Opinion Scores (MOS). These results provide an excellent overall measure of
voice quality of the equipment under test.
The Dual UTA contains 2 Handset testing interfaces (RJ22). This allows a user the ability to replace the handset with
the Dual UTA, but continue to include the “Telephone Base Unit” in the testing network. Basically, the
Dual UTA replaces the handset of any telephone that contains a handset. This includes POTS, Digital PSTN and VoIP telephones
that contain a handset.
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The Dual Universal Telephony Adapter (Dual UTA) is a comprehensive hardware device designed to interface and test the voice quality of
telecommunication networks. The Dual UTA features all the circuitry necessary to universally adapt to any telephony instrumentation, such as
standard Plain Old Telephone Systems (POTS), digital hybrid interfaces, Voice over Internet Protocol (VoIP) networks, wireless cellular phones
and mobile radios including devices that utilize Bluetooth® technology.
As the name implies the Dual UTA contains a Side 1 and a Side 2. These sides are completely independent of each other so interfacing with
endpoints of a single network or interfacing with two completely separate networks are plausible scenarios.
Used in conjunction with GL's VQuad™ software application, the Dual UTA simplifies end-to-end testing of voice quality, echo, noise, and other
impairments of TDM, VoIP, and Wireless networks. A GPS sync port permits precise synchronization of sending and receiving audio functions,
one-way delay (OWD), and round trip delay (RTD). The Dual UTA can be directed to automatically send and record sample voice files between nodes of
a telephony network. These files can then be submitted to GL's Voice Quality Testing (VQT) software application for analysis according to widely
accepted International Telecommunications Union (ITU) voice comparison algorithms. These algorithms include PESQ, PAMS and PSQM.
Main Features:
- Connect to any phone with a handset
- Test VoIP, Analog and Digital Phones, thus allowing VoIP ATA testing'
- Up to two Dual UTA's connected to a single VQuad system.
- Round Trip Delay and One Way Delay Measurements as well as Echo Measurements
- Automatic send/receive of voice files over already established calls
- Time/Digit/Tone triggering of send/receive voice files.
- Compact and portable solution for testing end-to-end voice quality
- Synchronized software for sending/recording of voice files at multiple locations
- Flexible architecture and features for recording locations, parameters, and time
- GL VQT Automatic Mode allows automatic execution of the VQT algorithms (PESQ LQ/LQO/WB).
- Additional measurements include Clipping, Jitter, Latency, Noise and Signal Levels.
- Results available in real-time or post-processing
Waveform/Spectral Viewer
The GL VQT software can be user-configured to provide a rating of each measurement based on the scores, latency, clipping, etc.
A poorly rated measurement can be viewed in graphical format using the waveform viewer. Dropouts, noise and other impairments
can be examined here.
Screen Shot of Waveform/Spectral Viewer
Voice Quality Testing (VQT) Results
GL's VQT may be executed automatically (real-time and/or post-processing) or manually by entering a Reference File and Degraded
File. Regardless of how GL's VQT is initiated, algorithms for PAMS, PSQM, PSQM+, PESQ MOS and PESQ LQ are executed simultaneously
for the two voice files and results are shown graphically as well as in a tabular format. GL's VQT also displays cumulative statistics for
large scale testing over long periods of time.
Screen Shot of PESQ Measurement Window
Screen Shot of VQT Measurement Results
Screen Shot of VQT Cumulative Statistics
Buyer's Guide:
* Specifications are subject to change without notice.
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