Cisco 7821, Руководство администратора

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Computer Port Connector
The following table describes the computer port connector pinouts.
Table 3: Computer (Access) Port Connector Pinouts
Function Pin Number
BI_DB+ 1
BI_DB- 2
BI_DA+ 3
BI_DD+ 4
BI_DD- 5
BI_DA- 6
BI_DC+ 7
BI_DC- 8
BI stands for bidirectional, while DA, DB, DC, and DD stand for Data A, Data B, Data C, and
Data D respectively.
Note
Phone Power Requirements
The Cisco IP Phone can be powered with external power or with Power over Ethernet (PoE). A separate power
supply provides external power. The switch can provide PoE through the phone Ethernet cable.
When you install a phone that is powered with external power, connect the power supply to the phone and to
a power outlet before you connect the Ethernet cable to the phone. When you remove a phone that is powered
with external power, disconnect the Ethernet cable from the phone before you disconnect the power supply.
Note
Table 4: Guidelines for Cisco IP Phone Power
Guidelines Power Type
The Cisco IP Phone uses the CP-PWR-CUBE-3 power
supply. External power: Provided through the
CP-PWR-CUBE-3= external power supply
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
14
About the Cisco IP Phone
Computer Port Connector