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PRODUCT SPECIFICATIONS
Table 3 gives the specifications of the Cisco 3825 and the Cisco 3845.
Table 3. Specifications of Cisco 3825 and Cisco 3845
Cisco 3800 Series Features Cisco 3825 Cisco 3845
Physical Specifications
Dimensions (H x W x D) • 3.5 x 17.1 x 14.7 in.
• 2 Rack Unit (RU)
• 5.25 x 17.25 x 16 in.
• 3 Rack Unit (RU)
Weight (minimum) 23 lb 45 lb
Rack-Mounting Yes, 19- and NEBS/ETSI options Yes, 19- and NEBS/ETSI options
Wall-Mounting No No
Power Specifications
AC-Input Voltage 100-240 VAC, auto-ranging 100-240 VAC, auto-ranging
AC-Input Frequency 47-63 Hz 47-63 Hz
AC-Input Current • 3A (110V)
• 2A (230V)
• Startup current 50A maximum (one cycle)
• 4A (110V)
• 2A (230V)
• Startup current 50A maximum (one cycle)
AC-IP-Input current • 8A (110V)
• 4A (230V)
• Startup current 50A maximum (one cycle)
• 8A (110V)
• 4A (230V)
• Startup current 50A maximum (one cycle)
DC-Input Voltage 24-60 VDC, auto-ranging positive or negative 24-60 VDC, auto-ranging positive or negative
DC-Input Current • 12A (24V)
• 5A (60V)
• Startup current 50A<10 ms
• 18A (24V)
• 7A (60V)
• Startup current 50A<10 ms
Output • AC or DC power supply:
– 210W for system
• AC-IP power supply:
– 210W for system
– 360W for IP phones (-48V)
• AC or DC power supply:
– 300W for system
• AC-IP power supply:
– 300W for system
– 360W for IP Phones (-48V)
Redundant Power Supply (RPS) External only (Cisco RPS 675) Internal AC, AC-IP, or DC RPS
Recommended RPS Unit Cisco RPS 675 -
Power Dissipations
AC Without IP Phone Support 300W (1025 BTU/hr) 435W (1485 BTU/hr)
AC With IP Phone Support-System Only 370W (1262 BTU/hr) 555W (1890 BTU/hr)
AC With IP Phone Support-IP Phones 360W (1128 BTU/hr) 360W (1128 BTU/hr)
DC 325W (1100 BTU/hr) 460W (1570 BTU/hr)
Environmental Specifications
Operating Temperature 32° to 104°F (0° to 40°C) 32° to 104°F (0 to 40°C)
Non-Operating Temperature -40° to 185°F (-40° to 85°C) -40° to 185°F (-40° to 85°C)
Relative Humidity Non-Condensing 5-95% non-condensing 5-95% non-condensing
Operation Altitude Up to 6500 ft (2000m), derate 1C per 1000 ft Up to 6500 ft (2000m), derate 1C per 1000 ft
Noise Level (minimum) 50 dBa typical, 53 dBa maximum 56 dBa typical, 58 dBa maximum
