Aastra Telecom 57I CT, 55I, 53I manual Icom

Keys	Key Description
	Handsfree key - Activates Handsfree for making and receiving calls without lifting
	the handset. When the audio mode option is set, this key is used to switch between
	a headset and the handsfree speakerphone.
	Mute key - Mutes the microphone so that your caller cannot hear you (the light
	indicator flashes when the microphone is on mute).
	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.
	Pressing the LEFT and RIGHT arrow keys lets you view the different line/call
	appearances. While in the Options List, these 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.
	Programmable keys - 6 Top keys: programmable hard keys (up to 6 programmable
	functions)
	By default, the top keys 1 through 4 are assigned as Services, Directory, Callers List,
	and Intercom, respectively. Keys 5 and 6 have no assigned functions. All 6 keys are
	programmable and can be assigned to perform specific functions.
	The following are the default functions for the programmable keys on the 55i IP
	phone:
	1	- SERVICES	Accesses enhanced features and services such as XML
			applications and voicemail, provided by third parties.
	2	- DIRECTORY	Displays up to 200 names and phone numbers (stored in
			alphabetical order).
	3	- CALLERS LIST Accesses the last 200 calls received.
	4	- ICOM	Accesses another extension on the network.
	5	- NONE	No assigned function.
	6	- NONE	No assigned function.

Note: For more information about configuring the programmable keys 1 through 6 to perform specific functions, see Chapter 5, “Configuring Operational Features” the section, “Softkeys/Programmable Keys/Feature Keys/Expansion Module Keys” on page 5-93.