Owner's Manual

Note: Switch is the default setting.
To change the sound mode:
1. Use
34
to locate the sound mode menu on base display.
2. Use
5
6
to select one of the 3 modes from the menu, and choose between
fi xed/switched from the menu.
3. Press OK to confi rm the setting.
2.5.5 Protection level selection
Your headset offers a choice of 4 protection levels (plus its additional basic protection level).
These levels protect you against sudden, overly-loud sound spikes that may come from the
phone network (such as shrill telefax signals or network interference), and provide a limit to
the maximum noise exposure from the headset during your workday.
The number of hours (on average) you spend on the telephone per day determines the set-
ting you should select. All 4 protection levels meet and exceed de facto global protection
levels, and are compliant with NIOSH standards, and EU health and safety codes of 85 dB(A).
The TT4 protection level is compliant with pertinent Australian recommendation.
Important: In some jurisdictions, applicable regulations or laws may mandate the required setting
you use. The Default level provides a protection level of 118 dB(A). Your headset protects you
against overly-loud sound spikes. If you use the telephone’s handset for calling, you will not have
this protection.
Protection level Criteria for selecting
Level 0 Basic protection against overly-loud sound spikes
[118 db(A)]. Auto volume disabled
Level 1* Less than 4 hours on telephone/day
Level 2* 4-8 hours on telephone/day
Level 3* More than 8 hours on telephone/day
Level 4 (TT4) Recommended Australian protection level (Telstra)
* Compliant with Directive 2003/10/EC of the European Parliament and Council of 6 February 2003.
To change the protection level:
1. Use
34
to locate the protection level menu on base display.
2. Use
5
6
to select one of the 5 modes from the menu.
3. Press OK to confi rm the new mode.
8