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Welcome to another February 2012 issue of GL's Newsletter providing information and insight into our latest software Enhanced Fax Emulation.

Fax emulation has never been easier using GL's products. Now – low cost, easy to use fax emulation is available with our VQuad™ and Dual UTA 2-wire and 4-wire hardware platforms.


VQuad™ coupled with Dual UTA provides easy and flexible “quality of service” assessment across almost every network interface – whether it's IP, TDM, Analog, or Wireless – one platform handles all possibilities - Voice Quality, Data 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 hardware platform. The user can configure the TX and RX fax rate from 2400 bps to 33,600 bps - V.34 is 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) are coming within months. 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's 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's 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.

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 be generated.

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 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.

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.

Important Features

  • Fax Emulation supporting up to 4 independent and simultaneous sessions with speeds up to 33600 baud (V.34). Supports both Tx and Rx fax emulation using VQuad™ with Dual UTA analog interfaces (2-wire FXO, 4-wire balanced, 4-wire Handset, PTT).
  • VQuad™ Fax events includes 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

For comprehensive information on the application, you can refer to the Fax Emulation using VQuad™ web page.

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