Cisco 2811 ROUTER 2FE 1NME 4HWIC 2PVDM 2AIM IP BASE WITH A/C POWER SUPPLY Specification Guide

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Overview of Cisco 2800 Series Routers
OL-5783-01
  Specifications
Table 11
Cisco 2821 Router Specifications
Description
Specification
Dimensions (H x W x D)
3.5 x 17.25 x 16.4 in. (88.9 x 438.2 x 416.6 mm), 2 RU height
Weight
25 lb (11.36 kg) if fully populated with modules
AC input power
Input voltage
Frequency
Input current
Inrush surge current
100 to 240 VAC, autoranging
47 to 63 Hz
3 A (8 A for IP phone support)
50 A maximum, one cycle (–48 V power included)
DC input power
Input voltage
Input current
Inrush surge current
24 to 60 VDC, positive or negative
12 A
50 A, maximum, <10 ms
Power dissipation
(maximum)
AC without
IP phone support
AC with
IP phone support:
System only
IP phones
DC
280 W (955 BTU/hr)
310 W (1058 BTU/hr)
240 W (820 BTU/hr)
300 W (1024 BTU/hr)
Console and auxiliary ports
RJ-45 connector
Operating humidity
5 to 95%, noncondensing
Operating temperature
32 to 104
° F (0 to 40° C)
Nonoperating temperature
–4 to 149
° F (–20 to 65° C)
Noise level
44 dBA in normal ambient temperature; 
52 dBA in maximum ambient temperature
Safety compliance
UL 60950; CAN/CSA C22.2 No. 60950-00; IEC 60950; 
EN 60950-1; AS/NZS 60950
For detailed compliance information, refer to the Cisco 2800 and 
Cisco 3800 Series Integrated Services Routers Regulatory 
Compliance and Safety Information
 document.
Immunity compliance
EN300386; EN55024/CISPR24; EN50082-1; EN61000-6-2
For detailed compliance information, refer to the Cisco 2800 and 
Cisco 3800 Series Integrated Services Routers Regulatory 
Compliance and Safety Information
 document.