Configuring Audio Settings (Tuning Wizard)
41-001190-01 Rel. 1.1, Rev. 00 4-87
Configuring AastraLink Pro 160 System and Network Parameters
4 Follow the Tuning Wizard online instructions until the process is complete.
Important Notes:
1. The destination phone number MUST be an analogue line on the same central office switch as
the line connected to the FXO line 1.
- Remove PSTN line 2 from the VNX and plug it into a POTS phone instead; then perform the
tuning wizard and enter the number of line 2. The call is placed outbound on line 1.
- Answer the POTS phone and then mute it.
- Speak the Harvard phonetically balanced sentences and listen for hybrid distortion artifacts
such as echo, clipping, sibilance, and overall loudness/noise.
- Adjust the slider until the optimal position is met.
2. Because the echo canceller is disabled during this test, you should not be concerned about
excessively poor quality of the voice; after completing the wizard, echo canceller is re-enabled
and converges to remove any residual echo caused by imprecisely balanced line; the user is
aiming for 'best effort' not 'perfect' during the wizard, the DSP algorithms will do the rest.
Note: Higher line boost levels are only used to avoid problems with sibilance, clipping, or overdrive
on the line due to dynamic range compression. The signal to noise ratio degrades with higher boost
levels, so the lowest acceptable of the three choices should be used (i.e. standard) unless such
problems are encountered.
5 When you are finished, click <Exit> to save your changes and exit the Tuning Wizard.
Note: If you do not complete the tuning wizard (i.e. the Web UI times out), then the echo canceller
may not be re-enabled. It can be manually re-enabled at the location
Configuration->System->Regional Settings if required.
The Regional Settings menu updates to reflect the Connection Type, Line Boost Level, and Line
Profile that you specified during the Tuning Wizard procedure.
You can repeat the Tuning Wizard procedure as necessary to refine the audio quality on your phone
lines.
AastraLink Web UI
Step Action
