CTP Systems CTPhone 1900, Руководство по применению

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CTPhone 1900 System Overview
Figure 1-6. CTPhone Handset
Handset Display
The CTPhone handset features a four line display that contains two lines
for alphanumeric information and two lines for icon displays.
The text display area displays date and time and information about activity
taking place, such as dialed number. It also provides prompts that assist
callers through various tasks like storing speed dial numbers and setting
ring type.
You can also control the amount of contrast in the handset display.
display area
volume keys
ear phone
microphone
hang-up
call initiation
and answer
standard dial pad