Datasheet
Data Sheet
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Table 6. Product Specifications: Weight
System Configurations Weight
Cisco Catalyst 4900M 8-port base unit plus fan (no power supply) 25.0 lb (11.3 kg)
Cisco Catalyst 4900M 8-port base unit plus fan plus 1 AC power supply 29.5 lb (13.4 kg)
Cisco Catalyst 4900M 8-port base unit plus fan plus 2 AC power supplies 34.0 lb (15.4 kg)
Cisco Catalyst 4900M 4-port 10 Gigabit Ethernet half card with X2 interfaces 1.5 lb (0.7 kg)
Cisco Catalyst 4900M 20-port 10/100/1000 RJ-45 half card: 1.5 lb (0.7 kg)
Cisco Catalyst 4900M 8-port 10 Gigabit Ethernet half card with X2 interfaces 2.5 lb (1.1 kg)
Indicator and Port Specifications
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System status: Green (operational); red (faulty)
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Console: RJ-45 socket
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Reset (switch recessed for protection)
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Image management port: 10/100/1000BASE-T (RJ-45 socket) data terminal equipment
(DTE); green (good), orange (disabled), and off (not connected)
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Air Flow Specifications (Average)
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Airflow at 25°C (77°F) is approximately 77 cubic fe et per minute (cfm)
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Airflow at 55°C (131°F ) is approximately 150 to 16 0 cfm
Table 7 shows the air flow specifications by speed.
Table 7. Air Flow Specifications by Speed
Speed Level RPM Airflow ft3/minute (m3/minute)
0 4953 77.7 (2.2)
1 7109 118.4 (3.4)
2 7752 127.6 (3.6)
3 9449 151.7 (4.3)
Power-Supply Specifications
The Cisco Catalyst 4900M offers a choice of 1000-watt (W) AC or DC power supplies. The switch
can operate with one power supply present. When two power supplies are installed, the switch
shares the power load between the two power supplies (Table 8).
Table 8. AC and DC Power Supply Specifications
Item 1000W AC 1000W DC
Input current 14.12A root mean square maximum at 85 VAC input 31.60A maximum at –40.5 VDC input
Output current Maximum 80.0A Maximum 80.0A
Weight 4.5 lb (2.0 kg) 4.5 lb (2.0 kg)
Heat dissipation Maximum use 818.88 British thermal units (Btus) per hour Maximum use 1091.84 Btus per hour
Power Use by Configuration
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40 10/100/1000 ports and 8 10 Gigabit Ethernet (X2) ports at normal operating
temperature: 336 watts
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16 10 Gigabit Ethernet ports at normal operating temperature: 318 watts
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24 10 Gigabit Ethernet ports at normal operating temperature: 353 watts