Cisco 6841 Installation Manual - Page 35

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Physical and Operating Environment Specifications

Specification

Power for Cisco IP Phones

Power for Cisco IP

Conference Phones

Supported Ethernet Cables

Distance requirements

Value and Range

• When using the AC adapter:

◦ 6800 series: 100-240 VAC, 50-60 Hz, 0.4 A

◦ 7800 series: 100-240 VAC, 50-60 Hz, 0.5 A

◦ 8800 series: 100-240 VAC, 50-60 Hz, 0.5 A

• When using the in-line PoE cable: 48 VDC, 0.2 A (6821, 6851, 7800 series and 8800

series)

• 7832

◦ IEEE PoE Class 2. The phone is compatible with both IEEE 802.3af and 802.3at

switch blades and supports both Cisco Discovery Protocol and Link Layer

Discovery Protocol - Power over Ethernet (LLDP-PoE)

◦ If the connected LAN switches don't support PoE, an additional PoE power injector

will be needed to convert AC wall power to provide PoE

• 8832

◦ IEEE PoE Class 3 via a PoE injector. The phone is compatible with both IEEE

802.3af and 802.3at switch blades and supports both Cisco Discovery Protocol and

Link Layer Discovery Protocol - Power over Ethernet (LLDP-PoE).

◦ Other options include a non-PoE Ethernet injector if the connected LAN switches

don't support PoE. For Wi-Fi deployment, a Cisco IP Conference Phone 8832

Power Adapter is needed.

• 6800 series

◦ Category 3/5/5e/6 for 10-Mbps cables with 4 pairs

◦ Category 5/5e/6 for 100-Mbps cables with 4 pairs

◦ Category 5/5e/6 for 1000-Mbps cables with 4 pairs (not for 6821 and 6861)

• 7800 series

◦ Category 3/5/5e/6 for 10-Mbps cables with 4 pairs

◦ Category 5/5e/6 for 100-Mbps cables with 4 pairs

◦ Category 5/5e/6 for 1000-Mbps cables with 4 pairs (for 7841 only)

• 8800 series

◦ Category 3/5/5e/6 for 10-Mbps cables with 4 pairs

◦ Category 5/5e/6 for 100-Mbps cables with 4 pairs

◦ Category 5e/6 for 1000-Mbps cables with 4 pairs

• 7832

◦ Category 3/5/5e/6 for 10-Mpbs cables with 4 pairs

◦ Category 5/5e/6 for 100-Mbps cables with 4 pairs

• 8832: USB-C cable

Note: Cables have 4 pairs of wires for a total of 8 conductors

As supported by the Ethernet Specification, the maximum cable length between

each Cisco IP Phone and the switch is assumed to be 330 feet (100 meters).

Installation Guide for Cisco IP Phone with Multiplatform Firmware

Technical Details