Clean The Phone Screen; Differences Between Phone Calls And Lines; Power Requirements; Phone Firmware And Upgrades - Cisco 7811 User Manual

Differences Between Phone Calls and Lines

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Clean the Phone Screen

Procedure
If your phone screen gets dirty, wipe it with a soft, dry cloth.
Caution
Differences Between Phone Calls and Lines
We use the terms lines and calls in very specific ways to explain how to use your phone.
• Lines—Each line corresponds to a directory number or intercom number that others can use to call you.
• Calls—Each line can support multiple calls. By default, your phone supports four connected calls per

Power Requirements

The following Cisco-approved power adaptors must be used with the Cisco IP Phone 7800 Series:
• Phihong adapter (PSC18U-480); Rating: 48 VDC 0.38A
• Delta adapter (EADP-18VB B); Rating: 48 VDC 0.375A

Phone Firmware and Upgrades

Your phone comes with firmware already installed, which is specific to the call control system that your phone
uses.
Cisco IP Phone 7800 Series User Guide
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At the top of the screen is the header row. The header row displays the phone number, current
date and time, as well a number of icons. The icons display when features are active.
The middle of the phone screen displays the information associated with the line and feature
buttons on the phone.
The bottom row of the screen contains the softkey labels. Each label indicates the action for the
softkey button below the screen.
Do not use any liquids or powders on the phone because they can contaminate the phone components
and cause failures.
You have as many lines as you have directory numbers and phone line icons. Depending upon how your
phone is configured, you could have up to 16 lines.
line, but your administrator can adjust this number according to your needs.
Only one call can be active at any time; other calls are automatically placed on hold.
Here is an example: If you have two lines and each line supports four calls, then you could have up to
eight connected calls at one time. Only one of those calls is active and the other seven are held calls.
Your Phone