Cisco 7821 Installation Manual - Page 35

Browse online or download pdf Installation Manual for IP Phone Cisco 7821. Cisco 7821 39 pages. Connaught
Also for Cisco 7821: Release Notes (16 pages), Quick Start Manual (2 pages), User Manual (18 pages), Quick Reference Manual (4 pages), Quick Reference (4 pages), Quick Installation & User Manual (12 pages), Reference Manual (11 pages), Quick Start Manual (4 pages), User Manual (10 pages), Manual (27 pages), User Manual (20 pages), Employee Quick Reference Manual (4 pages), Firmware Migration Master Manual (31 pages), Manual (43 pages), Quick Start Manual (6 pages), Quick Reference Card (2 pages), Quick Start Manual (2 pages), Manual (20 pages), Reconfiguration Manual (2 pages), Quick Start Manual (7 pages), Quick Installation Manual (12 pages), User Manual (27 pages), User Manual (2 pages), Getting Started (2 pages), Quick Start Manual (2 pages), User Manual (5 pages)

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Cisco 7821 Installation Manual
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
31