Cortelco cp4400 Manual De Usuario

9

1

With the phone on hook, press the MUTE button.  The screen will display 1.
SET DATE

2

Press the VOL+ button twice.  The screen will display 3 LCD BRIGHT.

3

Press the MUTE button.  The screen will display BRIGHT and a series of “1”
representing the display contrast.

4

Use VOL+ and VOL- to adjust the display contrast.

5

Press the MUTE button.  The screen will display 3 LCD BRIGHT.

6

Wait a few seconds and the screen will go to idle and display the date and
time

1

With the phone on hook, press the MUTE button.  The screen will display 1.
SET DATE

2

Press the VOL+ button three times.  The screen will display 4 INTERFACE.

3

Press the MUTE button.  The screen will display USB PSTN.  Insure that
PSTN is blinking.

4

Press the MUTE button.  The screen will display 4 INTERFACE.

5

Wait a few seconds and the screen will go to idle and display the date and
time.