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1-3
Cisco Catalyst 4900M Switch Installation Guid e
78-18350-02
Chapter 1 Product Overview
Catalyst 4900M Switch Chassis
Note A console cable is not provided as part of the accessory kit. It is available as an option.
Catalyst 4900M Switch Chassis Physical and Environmental Specifications
Table 1-2 lists the Catalyst 4900M switch chassis environmental and physical specifications.
Reset switch The Reset button is used to restart the switch. Use a paper clip or other small,
pointed object to press the Reset button.
Fan tray Variable-speed. Field replaceable.
Power supplies 1000 W AC-input and 1000 W DC-input power supplies are supported.
Table 1-1 Catalyst 4900M Switch Features (continued)
Feature Description
Ta ble 1-2 Catalyst 4900M Switch Specifications
Item Specification
Environmental
Temperature, operating Certified for operation: 32° to 104°F (0° to 40°C)
Designed and tested for operation: 32° to 131°F (0° to 55°C)
Note The Catalyst 4900M switch is equipped with internal air temperature
sensors that are triggered at 49°C (120.2°F) generating a minor alarm
and at 64°C ( 147.2°F) generating a major alarm. The system will shut
down at 67°C (152.6°F).
Temperature, nonoperating
and storage
–40° to 167°F (–40° to 75°C)
Humidity (RH), ambient
(noncondensing) operating
10% to 90%
Altitude, operating Certified for operation: –197 to 6562 ft (–60 to 2000 m)
Heat Dissipation 1364 BTU/hour (worst case)
Physical Characteristics
Dimensions (H x W x D) • 3.5 x 17.2 x 17.9 in. (8.9 x 43.7 x 45.5 cm).
• Chassis requires 2 RU
1
.
• The Catalyst 4900M switch chassis is designed to install in standard
19-inch equipment racks that meet ANSI/EIA 310-D, IEC 60297, and
ETS 300-119 standards.
1. RU = rack units
Weight 34.0 lb (15.4 kg) (max)
Airflow 151.7 CFM (max)

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