Overview |
Main Features |
Near Real-time Monitoring
User Interface |
Typical Configurations |
Buyer's Guide
Overview
The Near Real-time Voice-band Analyzer (VBA) is an analysis tool for monitoring voice band traffic over VoIP, TDM
and wireless networks. It can host an arbitrary number of analysis algorithms. Built-in algorithms include ITU-T P.56
Active Voice Level analysis, Line Echo (Hybrid) analysis, and Acoustic Echo analysis. Other analysis modules such as
ITU-T P.561, P.562, and P.563 can be hosted as plug-ins.
The VBA application operates on previously captured files, making it a near-real time (as opposed to a strictly
real-time) tool. It supports A-Law, µ-Law, 16-bit PCM (Intel), 16-bit PCM (Motorola) and MS Wave file formats. This
package has been designed to work with other GL Communications Inc. tools such as PacketScan™, Call Capture and
Analysis, and many other recording tools.
VBA works in conjunction with GL's TDM, Packet, and Wireless non-intrusive capture products:
- VBA with GL's TDM T1 E1 Call Capture and Analysis, or
- VBA with GL's VoIP PacketScan™
- VBA with GL's GSM, CDMA, and 3G Call Capture Products
- VBA with GL's 2-Wire Voice/Data Capture Products
Screenshot of Voice-band Analyzer Main Window
Main Features
- Near real-time (NRT) non-intrusive analysis platform.
- Supports 1, 2, 3, and 4-port signal data analysis
- Manual, batch, and automatic processing modes.
- Accepts A-Law, µ-Law, 16-bit PCM (Intel), 16-bit PCM (Motorola) and MS Wave input data formats
- Hosts built-in P.56 Active Voice Level analysis, Hybrid Echo analysis, and Acoustic Echo Analysis and optional analysis
algorithms as plug-ins
- Allows the grouping of files together into data sets and automatically routes file data to appropriate inputs using
user-specified file naming conventions. GL Call Capture and Analysis (CCA) rules are built-in.
- User-selectable analysis output fields
- Native analysis output mode directly compatible with Microsoft® Excel and other readily available analysis tools.
- Database interfaces available on request.
- Source signal file management options
- Directly compatible with many GL data capture products, including Call Capture and Analysis (T1/E1 lines),
2-Wire Voice/Data Capture and PacketScan™ (VOIP).
- Compatible with products of other vendors provided only that their file-naming conventions could be used to group
files into sets and associate files with algorithm inputs.
Near Real-time Monitoring
GL's VoIP & TDM probes gather information intrusively and feed it to VBA for analysis. The VBA then instantly detects the
voice file captures and stores the results if necessary. The real-time and historic data collected by the probes can be output
to a remote database by configuring the options.
The output can be stored either in *.xls / *.txt files or in the database. VBA Analysis Probes run on multiple computers
and send VBA summary information and binary frame data via TCP connection to a Database Loader to load data
into a database.
The Database Loader inserts the received data into database tables via ODBC. It can selectively suspend or resume
loading data from connected probes. It also periodically updates the data link status in the DbLoaderStatus table to reflect
the data link status of the connected probes.
GL's web server will provide real-time and historic views of the data through various "browser based" clients.
The VBA operates in three fundamental modes:
- Manual:
The user specifies manually the files to be analyzed. Simultaneously two sets of files can be analyzed with appropriate
data format selected.
- Batch:
Using batch mode, users can analyze an entire set of assembled data files in a folder or in subfolders at once.
File naming conventions are used to group files and identify the appropriate input for each file. The results are recorded
and stored in a destination folder in *.CSV format, where they may be viewed with spreadsheet applications such as
Microsoft® Excel.
- Automatic:
This is similar to Batch processing, except the process continues indefinitely until the user manually stops the
execution. The specified folders are continuously scanned for the arrival of new files. The results are recorded and stored
in a destination folder in *.CSV format, where they may be viewed with spreadsheet applications such as Microsoft®
Excel.
Screenshot of recorded result file in Microsoft® Excel
User Interface
VBA GUI supports various modes of operation while analyzing voice band for speech level, line echo, and acoustic echo.
Link Emulation
The configure tab specifies the enabled inputs to be analyzed. By default, the analysis will be performed on all enabled
inputs. The parameters tab is used to configure the algorithm by setting the required parameters. And the display tab is
used to select the parameters that are to be displayed in the result area of the application.
P.56 Active Speech Level
The Active Speech Level is reported either in units of dBm (P.56 standard) or as dB relative to a full-scale sine wave
(PCM standard). All the parameters have fixed values. In addition to active speech level, the application displays Activity
factor, RMS factor, Noise Level, Absolute Maximum Sample Value, Maximum Positive Sample Value, Maximum Negative
Sample Value and DC level.
Line Echo Model Configuration
Line Echo has two classes of variable parameters: Echo Path Model and Double-Talk Detection parameters. The
application displays the echo parameters such as ERL (dB), Echo Delay (ms) and Echo Dispersion (ms).
Acoustic Echo Model Configuration
Acoustic Echo has two variable parameters: "Tail Length" and "Tail Offset". The application displays the parameters
such as ERL (dB), Echo Delay (ms) and Echo Dispersion (ms).
Intermittent Acoustic Echo is a common feature of many systems. The Acoustic Echo Modeler is equipped to recognize
and report short-duration bursts of echo.
File Naming Convention in Batch and Auto Setup
The file name convention allows users to identify source data files and to group them into data sets in Batch or Auto
Mode operations. The naming conventions used are CCA – Standard, CCA-MFCR2, and CCA-ISDN, which is the GL
Communications Inc. Call Capture and Analysis application.
The illustrations for the types of file naming conventions are as below:
For Example:
- CCA-Standard naming convention is Apr02E01_0123.abc, where
Apr02E01_0123.abc stands for <Mon><Day><INP><CHAN:2><LIT:><INT:4><
LIT:.><TXT:1-3>.
- CCA MFCR2 naming convention is Apr02E01.012, where it stands
for <Mon><Day><INP><CHAN:2><LIT:.><INT:3>
- CCA ISDN naming convention is
0123456789001234567890_0123456789001234567890_Apr02E01_0123_0001.abc, where it stands
for <INT:1-25><LIT:><INT:1-25><LIT:_><Mon><Day><INP><CHAN:2><
LIT:_>
<INT:1-10><LIT:_><INT:4><LIT:.><TXT:1-3>
User-friendly naming Convention
File naming conventions allows users to configure their own naming convention according to the requirement and to
create a corresponding pattern.
For Example:
<DAY:1,2><LIT:.><HR><LIT:.><MIN><LIT:.><SEC><LIT:_><INP><
LIT:.><TXT:1-3>
<LIT:S><INT:1-2><INP><LIT:.wav>
Typical Configurations
VBA with VoIP Probe (minimum configuration)
VBA with TDM Probe (minimum configuration)
VBA with GSM Probe (minimum configuration)
VBA with FXO RJ11 Hardware Tap and Audio Capture Software (minimum configuration)
Buyer's Guide:
Please Note: The XX in the Item No. refers to the hardware platform, listed at the bottom of the
Buyer's Guide, which the software will be running on. Therefore, XX can either be HDT, HDE or UTE depending upon the
hardware.
* Specifications are subject to change without notice.
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