Cisco 7800 Series Administration Manual page 26

Cable Specifications
Specification
Storage temperature
Height
Width
Depth
Weight
Power
Cables
Distance Requirements
For more information, see the Cisco IP Phone 7800 Series Data Sheet:
collaboration-endpoints/ip-phone-7800-series-multiplatform-firmware/datasheet-listing.html
Cable Specifications
• RJ-9 jack (4-conductor) for handset and headset connection.
Cisco IP Phone 7800 Series Multiplatform Phones Administration Guide
12
Value or Range
14° to 140°F (–10° to 60°C)
8.14 in. (207 mm)
• Cisco IP Phone 7811— 7.67 in. (195 mm)
• Cisco IP Phone 7821 — 8.11 in. (206 mm)
• Cisco IP Phone 7841 — 8.11 in. (206 mm)
• Cisco IP Phone 7861— 10.42 in. (264.91 mm)
1.1 in. (28 mm)
• Cisco IP Phone 7811— 0.84 kg
• Cisco IP Phone 7821 — 0.867 kg
• Cisco IP Phone 7841 — 0.868 kg
• Cisco IP Phone 7861— 1.053 kg
• 100-240 VAC, 50-60 Hz, 0.5 A—When using
the AC adapter
• 48 VDC, 0.2 A—When using the in-line power
over the network cable
Cisco IP Phone 7811, 7821, 7841, and 7861:
• Category 3/5/5e/6 for 10-Mbps cables with 4
pairs
• Category 5/5e/6 for 100-Mbps cables with 4 pairs
Cisco IP Phone 7841: Category 5/5e/6 for 1000-Mbps
cables with 4 pairs
Note Cables have 4 pairs of wires for a total of
8 conductors.
As supported by the Ethernet Specification, it is
assumed that the maximum cable length between each
Cisco IP Phone and the switch is 100 meters
(330 feet).
https://www.cisco.com/c/en/us/products/
About the Cisco IP Phone