Cortelco CP4400 instruction manual Set the Display Contrast, Set the Interface

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Set the Display Contrast

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

SET DATE

2Press the VOL+ button twice. The screen will display 3 LCD BRIGHT.

3Press the MUTE button. The screen will display BRIGHT and a series of “1” representing the display contrast.

4Use VOL+ and VOL- to adjust the display contrast.

5Press the MUTE button. The screen will display 3 LCD BRIGHT.

6Wait a few seconds and the screen will go to idle and display the date and time

Set the Interface

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

SET DATE

2Press the VOL+ button three times. The screen will display 4 INTERFACE.

3Press the MUTE button. The screen will display USB PSTN. Insure that PSTN is blinking.

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

5Wait a few seconds and the screen will go to idle and display the date and time.

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Contents CP4400 Series Conference Telephone Table of Contents CP4400 Features Important Safety Instructions Savetheseinstructions Telephone Part Identification Checklist of Parts InstallationConnect to Power and Telephone Line To Ensure Best PerformanceSetup Set the Date and TimeSet the Flash Time Set the Interface Set the Display ContrastTelephone Features Storing a Memory Dial Number Memory DialDialing a Memory Dial Number Caller IDMaintenance Information Telephone Service ProblemsTelephone Repair FCC Information Page Limited Warranty
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