Aastra 9143i Series Administrator's Manual page 49

Overview
IP Phone Models
Key Description
Keys
Mute key - Mutes the microphone so that your caller cannot hear you.
Navigation keys - Pressing the UP and DOWN arrow keys lets you view
different status and text messages on the LCD display (if there is more than
1 line of status/text messages). These buttons also let you scroll through
menu selections, such as the Options List.
UP Arrow - This key also acts as a Transfer Key, allowing you to transfer
calls when required.
DOWN Arrow - This key also acts as a Conference Key, allowing you to join
conferences when required.
Pressing the UP and DOWN arrow keys lets you view the lines on the LCD.
While in the Options List, the navigation keys allow you to exit or enter the
current option. When you are editing entries on the display, pressing the
LEFT arrow key erases the character on the left; pressing the RIGHT arrow
key sets the option.
*See the Aastra 6751i User Guide for more information about each of these keys.
41-001160-03, Rev 00, Releaes 2.4 1-19