Cisco Systems 8861 Manual De Usuario
Function
Pin number
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.
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.
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.
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
The following table provides guidelines for Cisco IP Phone power.
Table 4: Guidelines for Cisco IP Phone Power
Guidelines
Power type
The Cisco IP Phone uses the CP-PWR-CUBE-4 power supply.
External power: Provided
through the
CP-PWR-CUBE-4=
external power supply
through the
CP-PWR-CUBE-4=
external power supply
The Cisco IP Phone Power Injector may be used with any Cisco IP Phone.
Functioning as a midspan device, the injector delivers inline power to the
attached phone. The Cisco IP Phone Power Injector connects between a switch
port and the IP Phone, and supports a maximum cable length of 100m between
the unpowered switch and the IP phone.
Functioning as a midspan device, the injector delivers inline power to the
attached phone. The Cisco IP Phone Power Injector connects between a switch
port and the IP Phone, and supports a maximum cable length of 100m between
the unpowered switch and the IP phone.
External power—Provided
through the Cisco IP Phone
Power Injector.
through the Cisco IP Phone
Power Injector.
Cisco IP Phone supports IEEE 802.3af Class 1 power on signal pairs and spare
pairs.
pairs.
Cisco IP Phone supports IEEE 802.3af for external add-on devices.
Cisco IP Phones 8851 and 8861 support IEEE 802.3af for smartphone charging.
Cisco IP Phone 8861 supports IEEE 802.3at for tablet charging.
Cisco IP Phone 8861 supports IEEE 802.3at for tablet charging.
To ensure uninterruptible operation of the phone, make sure that the switch
has a backup power supply.
has a backup power supply.
Make sure that the CatOS or IOS version that runs on your switch supports
your intended phone deployment. See the documentation for your switch for
operating system version information.
your intended phone deployment. See the documentation for your switch for
operating system version information.
Support for 802.3at: The Cisco IP Phone can draw more power than IEEE
802.3af, as long as there is 802.3at switch support.
802.3af, as long as there is 802.3at switch support.
PoE power—Provided by a
switch through the Ethernet
cable attached to the phone.
switch through the Ethernet
cable attached to the phone.
Cisco IP Phone 8811, 8841, 8851, and 8861 Administration Guide for Cisco Unified Communications Manager
10.5
6
Phone Power Requirements