AASTRA 53i 安装指南

10 Model 57i CT IP Phone Installation Guide

57i CT Handset Key Panel

57i CT Handset Key Description

Function #

Function Description

1

Receiver

2

Volume key
• During Ringing: Adjusts ringer volume
• During a call: Adjusts receiver volume
• During text mode (not in a call): Moves cursor 

right/left

3

Display

4

Features ƒ Key List 
• Access key to the programmed Feature Key List
• Scrolls up when in the various lists
• Adds a space during editing

5

Softkeys
• Activates feature or option shown on the display 

above the keys

1

2

3

4
5

6

7

8

15

9

10

5

11

12

13
15
14

16