Data Sheet
© 2008 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 9 of 18
Cisco 2800 Series Cisco 2801 Cisco 2811 Cisco 2821 Cisco 2851
Minimum Cisco IOS
Software Release
12.3(8)T
Rack Mounting Yes, 19-inch Yes, 19- and 23-in. options
Wall Mounting No Yes No No
Power Requirements
AC Input Voltage 100 to 240 VAC, autoranging
AC Input Frequency 47-63 Hz
AC Input Current 2A (110V) 1A (230V) 3A (110V) 2A (230V)
AC Input Surge Current 50A maximum, one cycle (-48V power included)
AC-IP Maximum In-Line
Power Distribution
120W 160W 240W 360W
AC-IP Input Current 4A (110V) 2A (230V) 8A (110V) 4A (230V)
AC-IP Input Surge
Current
50A maximum, one cycle (-48V power included)
DC Input Voltage No DC Power Option
available
24 to 60 VDC, autoranging positive or negative
DC Input Current
●
No DC Power
Option available
●
8A (24V)
●
3A (60V)
●
Startup current 50A<10
ms
●
12A (24V)
●
5A (60V)
●
Startup current 50A<10 ms
Typical Power
Dissipation
(No Modules)
42W (143 BTU/hr) 32W (109 BTU/hr) 54W (184 BTU/hr) 58W (197 BTU/hr)
Power Dissipation-AC
without IP Phone
Support
150W (511 BTU/hr) 170W (580 BTU/hr) 280W (955 BTU/hr) 280W (955
BTU/hr)
Power Dissipation-AC
without IP Phone
Support
150W (511 BTU/hr) 170W (580 BTU/hr) 280W (955 BTU/hr) 280W (955
BTU/hr)
Power Dissipation-AC
with IP Phone Support-
System Only
150W (511 BTU/hr) 210W (717 BTU/hr) 310W (1058 BTU/hr) 370W (1262
BTU/hr)
Power Dissipation-AC
with IP Phone Support-IP
Phones
180W (612 BTU/hr) 160W (546 BTU/hr) 240W (819 BTU/hr) 360W (1128
BTU/hr)
Power Dissipation-DC Not applicable 180W (614 BTU/hr) 300W (1024 BTU/hr) 300W (1024
BTU/hr)
RPS No External only, connector for RPS provided by default
Recommended RPS Unit No RPS option Cisco RPS-2300 Redundant Power System
Environmental Specifications
Operating Temperature 32° to 104°F (0° to 40°C)
Non-Operating
Temperature
-4° to 149°F (-20° to
65°C)
-40° to 158°F (-40° to 70°C)
Maximum Operating
Temperature at Altitude
●
40°C @ sea level
●
31°C @ 6,000 ft
(1800 m)
●
25°C @ 10,000 ft
(3000 m)
Note: Derate 1.5°C per
1000 ft
●
40°C @ sea level
●
40°C @ 6,000 ft (1800 m)
●
30°C @ 13,000 ft (4000 m)
●
27.2°C @ 15,000 ft (4600 m)
Note: Derate 1.4°C per 1,000 ft above 6,000 ft
Operating Humidity 10 to 85% non-
condensing
5 to 95%, non-condensing
Dimensions (H x W x D)
●
1.72 x 17.5 x 16.5
in.
●
(43.7 x 445 x 419
mm)
●
1.75 x 17.25 x 16.4 in.
●
(44.5 x 438.2 x 416.6
mm)
●
3.5 x 17.25 x 16.4 in.
●
(88.9 x 438.2 x 416.6 mm)
Rack Height 1 rack unit (1RU) 2RU
