GL Communications - Automated Echo Canceller Testing

Download Auto Echo Canceller Testing User's Guide

Download Automated Echo Canceller Testing Brochure

Overview

AutoEC Test TDM-VoIP application is designed to work with the TDM and VoIP networks. It uses GL’s T1/E1 Analyzer on TDM side of the gateway and RTP Toolbox™ on IP side of the gateway to perform the G.168 compliance test. It tests EC conformance to the ITU-T Specifications, G.168 (01/2007), G.168 (08/2004), G.168 (06/2002), and G.168 (04/2000).

AutoEC Test application performs the following functions –

Generates the Rin file and Sgen file (double talk files)
Generates the script file for WCS echo path simulation
Generates the script file for the RTP Toolbox server to transmit stimulus file and receive the Sout file
Executes the batch file to perform the test
Automatically analyzes the Sout file per G.168 specifications

Features

MS-Windows OS (WIN 2000 or XP) with User-Friendly Graphical User Interface
Compatible with GL's T1/E1 HD Cards / USB portable T1/E1 units and RTP Toolbox™ application
Real-time as well as off-line analysis
Simulates an actual echo loop using Windows Client Server (WCS)
Auto analysis of the response according to G.168 (01/2007) requirement
Auto or Manual control of the EC during testing
Tabular Pass/Fail Results
Simulation of echo path with various delay, attenuation, hybrid filters, noise level, and more
Detailed graphical results for individual overall test

Operation

The following steps are required to set up the AutoEC Test TDM- VoIP software.

Select T1 or E1 as TDM interface
Configure the GL hardware –T1/E1 card
Configure the client settings to connect to T1/E1 server and other processing options
Specify the location of T1/E1 server application
Setup ISDN Emulator to automatically answer calls from TDM side
Configure the IP address of the RTP Toolbox, media gateway, and client settings to connect to RTP Toolbox server
Specify the location of RTP Toolbox Server application
Set up the operator and EC information
Select the EC control option as either Auto or Manual
Configure G.168 test parameters
Run the test cases
Display the Sout graphically after all the tests are performed

EC RS 232 Control Setup

The Echo Canceller is manually or automatically controlled for

Zeroing the contents of the echo canceller's H-register
Enabling and inhibiting echo canceller convergence
Enabling and disabling the non-linear processor
If the echo canceller has a comfort noise feature, enabling and disabling the comfort noise generator

The Auto EC control mode allows users to specify the commands required to control the operation of the echo canceller. Thus, the application automatically controls the operation of the EC through RS232 serial port, TTL control (optional feature) and Ethernet (optional) during each trial.

EC Control Mode

Test Cases Supported

Test 1: Steady state residual and returned echo level test (G.168 version 04/2000 only)
Test 2A : Convergence Test with NLP Enabled
Test 2B: Convergence Test with NLP Disabled
Test 2C: Convergence Test in the Presence of Background Noise
Test 2C-c: Convergence test with NLP disabled (G.168 version 01/2007)
Test 3: Performance under Conditions of Double Talk
Test 3A: Double Talk Test with Low Near End Levels
Test 3B: Double Talk Test with High Near End Levels
Test 3B Part b: Double talk stability test with low cancelled-end levels (G.168 version 01/2007)
Test 4: Leak Rate Test
Test 5: Infinite Return Loss Convergence Test
Test 6: Non-Divergence on Narrow-Band Signals
Test 7: Stability Test
Test 10B: Canceller operation on the called station side
Test 14: Low speed modem test (Optional)
Test 15A and 15B: PCM offset test

Test Under Development

Test 2A Part b: Re-convergence test with NLP enabled (G.168 version 01/2007)
Test 2B Part b: Re-convergence test with NLP disabled (G.168 version 01/2007)
Test 2C: Convergence Test in the Presence of Background Noise
Test 3C:Double Talk Test under Simulated Conversation
Test 8: Non-convergence of Echo Cancellers
Test 9: Comfort Noise Test
Test 10A: Canceller operation on the calling station side

Screenshots

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.

Item No.	Item Description
PKB080	AutoECTest TDM-VoIP Fully Automated EC Testing per G.168 for combined TDM-VoIP Interfaces
PKB100	RTP ToolBox™ (Included)
PKB110	Client / Server for RTP Toolbox™ (Included)
XX600	Basic Windows Client/Server Scripted Control Software (Included)
XX105	ISDN Emulator
	Related Software
PKB067	AutoECTest - Automatic G.168 Compliance Test Suite
PKV100	PacketScan™ (Online and Offline)
XX062	Echo Path Delay/Loss Simulation Software
XX630	DSP Functionality (Included)
XX610	File based Record/Playback (Included)
	Related Hardware
HDT001/HDE001	HD T1 or E1 (PCI) Cards with Basic Analyzer Software
UTA001/UEA001	Portable USB based Dual T1 or E1 Laptop Analyzer
	Recommended Accessories
SA013	T1 / E1 On Site Training Class (not including travel or hotel)
SA021	File Edit Software
SA026	Adobe Audition Multitrack Sound File Viewing and Editing Software
SA048	Goldwave Software
SA017A	RJ48C to RJ48C Straight Cable, 10ft. cable
SA017A	RJ48C to RJ48C Crossover Cable, 10ft. cable
SA008a	Handset Adapter with Handset
SA022	Extended 1 Yr. Software Upgrades and Comprehensive Support
SA023	Extended 1 Yr. Hardware Warranty
SA0XX	Extended 1 Yr. PC Warranty

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