Fax Emulation Using VQuad™
VQuad™ coupled with Dual UTA HD provides easy and flexible “quality of service” assessment across almost every network interface – whether its IP,
TDM, Analog, or Wireless – one platform handles all possibilities - Voice, Data, Video Quality, and now Fax Quality. Fax is not going away – not by a long shot. For financial and legal reasons fax is a necessity.
GL’s VQuad™ has been enhanced to support sending and receiving of up to 4 independent and simultaneous T.30 faxes over the Dual UTA HD hardware
platform. The user can configure the TX and RX fax rate from 2400 bps to 33,600 bps with V.34 fully supported. Interfaces supported for fax generation include
2-wire FXO and 4-wire analog. Support for additional interfaces such as T1/E1 and VoIP (T.38) is coming soon.
Fax emulation is fully automated using VQuad™ scripts and can be initiated remotely such that one VQuad can control both sides of the fax.
VQuad™ Fax provides all pertinent real-time fax messaging with proper time sequences. In other words, one can follow the fax session from start to
finish on both the send and receive sides.
In addition to the fax messages, VQuad™ Fax also provides fax summary for each fax (fax completed or failed along with fax results). VQuad™ Fax
provides all errors associated with each fax with proper time sequence and an understanding of what the error might indicate. All results (errors and summary) can
be sent automatically to the WebViewer™ Central Database for query using the WebViewer™ browser.
In order to fully support GL Fax Analysis products, VQuad™ Fax provides the ability to automatically save the fax session (both East and West
directions) to a PCM file. This file can be exported to GLInsight™ or
GL Fax Demodulator/Decoder analysis software packages for further analysis of the fax session. GL's Fax
Demodulator/Decoder can be configured for fully automated analysis.
GL's WebViewer™ provides access and display, in real time, to all results associated with VQuad™
including the Fax events, errors, and summary logs.
- Fax Emulation supporting up to 4 independent and simultaneous sessions with speeds up to 33600 bps (V.34).Supports both Tx and Rx fax emulation
using VQuad™ with Dual UTA HD analog interfaces (2-wire FXO, 4-wire balanced, 4-wire Handset, PTT).
- VQuad™ Fax events include messages, summary, and errors log
- Ability to auto save fax (both East and West directions) to PCM file for enhanced analysis using GL Insight™ and
GL Fax Demodulator/Decoder
- VQuad™ scripting supports both fax send and receive session configuration
- Support for querying Fax events/results/errors over web interface.
- Support for additional interfaces such as T1/E1 and VoIP (T.38) is coming soon
VQuad™ Fax Events
VQuad™ Fax Emulation includes three event screens, Fax Messages, Fax Summary and Fax Errors. The Fax Messages is shown in chronological
order for simple understanding of the fax process. Multiple Fax Message screens can be displayed simultaneously thus showing full duplex fax sessions.
The Fax Summary includes one event per fax (Fax Send and Fax Receive) which shows initial settings and final settings upon fax completion (i.e. Fax
Speed, Line Sent, Bad Lines, Pages Received). The Fax Summary also provides insight whether the Fax was successful or the Fax failed in which case an Error will
The Fax Error screen provides all Fax Errors associated with the Fax Send/Receive. Additional information is provided for each Fax error in order to
understand the cause of the error. All event screens can be saved to text file in real-time.
The Fax status as shown on the Fax Event screen displays Total Successful and Total Failed faxes for each VQuad™ device ID.
FAX Events – Messages Log
Screenshot of VQuad™ Fax Events Summary Log
Screenshot of VQuad™ Fax Events Errors Log
Fax Tx/Rx Configuration
VQuad™ scripting provides the ability to send and receive a fax session along with specifying necessary fax configuration settings.
The settings include Max Transmit Rate and Min Receive Rate which can effectively restrict available fax sessions.
The other configuration settings include:
- ECM (Error Correction mode) on / off option to automatically detect and correct errors
- RX Image Coding (receive fax only) options - MH (Modified Huffman), MR (Modified read), MMR (Modified Modified READ)
- Auto saved fax (both east and west) to PCM file can be analyzed using GL Insight and GL Fax Extractor
Fax Tx/Rx Configuration
Remote Client WebViewer™
The VQuad™ Fax emulation summary and error results can be sent to the WebViewer™ Central database. These events can be queried using
the WebViewer™ web based browser. From the WebViewer™, one can filter the results based on specific Error, Starting or Ending speed, Completed
pages, Tx/Rx Lines including Bad Lines, Resolution and ECM settings.
Fax Results View in WebViewer™
* Specifications are subject to change without notice.
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