14
Use in Low Audio (Phone, PABX, and Full-duplex Private 
Calls)
When placing or receiving a call and while speaking, hold 
your MTH800 as you would a telephone. Speak into the 
bottom microphone. Listen via the earpiece.
Keep antenna at least 2.5 centimetres from your head and 
body.
Use in High Audio (Group and Private Calls)
Hold MTH800 in a vertical position with its top microphone 
5.0 to 10 centimetres away from your mouth. Speak into the 
top microphone. Listen via the terminal's internal speaker.
Keep antenna at least 2.5 centimetres from your head and 
body.
Lapel/Shoulder Use
For Group and Private Calls turn your head towards your 
shoulder/lapel, and speak directly into the top microphone. 
Listen via the terminal's internal speaker.
Speakerphone Use
Place the MTH800 30 to 60 centimetres away from you. In a 
noisy environment, you may want to move the MTH800 closer 
to you for better transmission.
Looking after your MTH800
Never leave your MTH800 or battery in extreme 
temperatures (over 60 °C)—for example, behind windscreen 
in very hot, direct sunlight. Do not immerse your MTH800 in 
water.
To clean your 
 MTH800, use a moistened or antistatic cloth. 
DO NOT use a dry or electrostatically charged cloth.
6802972C35.book  Page 14  Monday, August 16, 2004  9:22 PM