1-35
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-02
Chapter 1      Overview of the Routers
  Specifications
Weight - fully configured  21 lb (9.52 kg)
Power
AC input power
  •
Input voltage 100 to 240 VAC, autoranging
  •
Frequency 47 to 63 Hz
  •
Input current  0.35 A to 2.3 A (configuration dependent)
  •
Input current with AC-POE 0.4 A to 3.5 A (configuration dependent)
  •
Surge current 30 A maximum at 115 VAC 60 Hz, 60 A maximum at 230 VAC 50 
Hz
Power Consumption 65 W to 220 W, 221 to 751 BTU/hr (configuration dependent)
  •
With AC-POE 70 W to 330 W, 239 to 1126 BTU/hr (configuration dependent)
Ports
Console port  One RJ-45 connector and one mini USB Type B, USB 2.0 
compliant
Auxiliary port RJ-45 connector
USB ports  Two USB Type A, USB 2.0 compliant, 2.5 W (500 mA) max.
1
10/100/1000 Gigabit Ethernet  Three RJ-45 connectors (GE0/0, GE0/1, GE0/2), auto-MDIX
2
Environmental
Operating humidity 5 to 85% RH
Operating humidity (short-term 
per NEBS)
5% to 90%, but not to exceed 0.024 kg water/kg of dry air
Operating temperature up to 5906 
ft (1800 m) elevation
32 to 104° F (0 to 40° C)
Operating temperature up to 9843 
ft (3000 m) elevation
32 to 104° F (0 to 40° C)
Operating temperature up to 
13,123 ft (4000 m) elevation
32 to 86° F (0 to 30° C)
Temperature - (Short-term per 
NEBS/1800m max altitude)
23°F to 122°F (-5°C to 50°C)
Operating altitude maximum 13,123 ft (4000 m)
Transportation and Storage
Nonoperating temperature -40 to 176° F (-40 to 80° C)
Nonoperating humidity 5 to 95% RH
Nonoperating altitude 15,000 ft (4570 m)
Acoustic
Acoustic: Sound Pressure 
(Typical/Maximum) 
51.8/62.9 dBA
Acoustic: Sound Power 
(Typical/Maximum)
58.5/70.3 dBA
Table 1-15 Cisco 2911 Router Specifications (continued)
Description Specification