Overview |
Main Features |
Details of Echo Canceller Test Scripts
Screenshots |
Buyer's Guide
Overview:
GL's Optional Software "Semi-Automated and Scripted Echo Canceller Testing Suite", part number xx068, provides G.168 compliance
testing capability in simple modifiable scripts for each and every G.168 test. The scripts can be easily modified by the user to test
different scenarios. Outputs from the EC are also analyzed automatically by the AutoAnalysis Software. The three major software
components consist of the following:
- Windows Client/Server Software - this software provides powerful scripting capabilities for testing the EC
- xx600 - Basic Client/Server Scripted Control Software with the following submodules
- xx610 - with File based Record/Playback
- xx630 - with DSP Capability
- Complete G.168 Test Scripts using a variety of Clients, scripts can be provided in the following formats
- C++ Client - a simple and sufficient Client with all scripts for semi-automated analysis of per G.168
- Labview Client - provided at some additional cost
- Matlab Client - provided at some additional cost
- Auto-Analysis Software - this software automatically analyzes the output files for compliance, see screen shots below
Main Features:
- Far End real-time emulation using GL's WCS (scripted) software/language.
- Near End real-time emulation using GL's WCS (scripted) software/language.
- Echo canceller control using standard terminal emulation software.
- Millisecond-level visibility using Graphical output views.
- Additional analysis capability using Adobe Audition software or Goldwave software.
- All T1/E1 framing formats, signaling modes, and receiver interface strategies supported.
- Complete set of G.168 echo path models for emulation of Near End echo paths.
- G.168 CSS Single- and Double-Talk files recorded at various power levels.
- Detailed procedures for conducting G.168 compliance tests and analyzing results.
Details of Echo Canceller Test Scripts
GL's Semi-Automated and Scripted Echo Canceller Testing Suite provides support for the basic set of G.168 (2000) compliance
tests.
| Test 1 with NLP Off |
Steady state
residual and returned echo level test |
| Test 1 with NLP On |
Steady state
residual and returned echo level test |
| Test 2A |
Convergence test with NLP enabled |
| Test 2B |
Convergence test with NLP disabled |
| Test 2C with NLP Off |
Convergence test in the presence of background noise |
| Test 2C with NLP On |
Convergence test in the presence of background noise |
| Test 2C for noise level -55 dBmO |
Convergence test in the presence of background noise |
| Test 3A |
Double talk test with low near-end levels |
| Test 3B |
Double talk test with high near-end levels |
| Test 3C |
Double talk test under simulated conversation |
| 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 8 |
Non-convergence of echo cancellers on specific ITU-T No. 5, 6, and 7 in-band signaling and continuity check tones |
| Test 9 |
Comfort noise test |
| Test 10A with NLP Off |
Facsimile test for canceller operation on the calling station side |
| Test 10A with NLP On |
Facsimile test for canceller operation on the calling station side |
| Test 10B with NLP Off |
Facsimile test for canceller operation on the called station side |
| Test 10B with NLP On |
Facsimile test for canceller operation on the called station side |
| Test 10C |
Not Defined by ITU - For Further Study |
| Test 11 |
Not Defined by ITU - For Further Study |
| Test 12 |
Not Defined by ITU - For Further Study |
| Test 13 |
Not Defined by ITU - For Further Study |
| Test 14 |
Not Provided |
| Test 15 |
PCM Offset Test |
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 DPT, DPE, PCT, PCE, HDT, HDE, DLT, DLE or UTE depending
upon the hardware.
Back to Echo Canceller Testing Solutions Main Page
![Client Screen](javascript:myOpen("images/echo_canceller_testing8.gif")){kind=link}
![Server Screen](javascript:myOpen("images/echo_canceller_testing9.gif")){kind=link}
![G.168 Test Results Offline Analyzer](javascript:myOpen("images/echo_canceller_testing4.gif")){kind=link}
![Test 2B Convergence Test Results with NLP Off](javascript:myOpen("images/echo_canceller_testing5.gif")){kind=link}
![Hyper Terminal Control of EC](javascript:myOpen("images/echo_canceller_testing6.gif")){kind=link}
![Sample Scripts](javascript:myOpen("images/echo_canceller_testing7.gif")){kind=link}
