Hardware Specifications; Power Specifications - Cisco Catalyst 2940 Series Datasheet

Table 2.

Hardware Specifications

Description
Performance
100BASE-FX fiber-port
power levels
Connectors and cabling
Power connectors
Indicators
Dimensions
Weight
Environmental Ranges
Acoustic Noise
Telco CLEI Code
Mean Time Between Failure
(MTBF)—Predicted
Warranty
Table 3.

Power Specifications

Description
Power Consumption
AC input voltage/frequency
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Specification
● 3.6 Gbps maximum forwarding bandwidth
● 2.7 Mpps wire-speed forwarding rate (based on 64-byte packets)
● 16 MB DRAM and 8 MB Flash memory
● Configurable up to 8000 MAC addresses
● Configurable up to 255 multicast groups
● Configurable maximum transmission unit (MTU) of up to 1500 bytes
● 128 802.1Q VLANs
● 4096 VLAN IDs
● 64 Spanning Tree Instances
● Optical transmitter wavelength: 1300 nm (nanometer)
● Optical receiver sensitivity for 50/125-micron cabling: -33.5 to -11.8 dBm (decibel milliwatt)
● Optical receiver sensitivity for 62.5/125-micron cabling: -33.5 to -11.8 dBm
● Optical transmitter power for 50/125-micron cabling: -23.5 to -14 dBm
● Optical transmitter power for 62.5/125-micron cabling: -20 to -14 dBm
● 10BASE-T ports: RJ-45 connectors; 2-pair Category 3, 4, or 5 unshielded twisted-pair (UTP) cabling
● 100BASE-TX ports: RJ-45 connectors; 2-pair Category 5 UTP cabling
● 1000BASE-T ports: RJ-45; 2-pair Category 5 UTP cabling
● 100BASE-FX ports: MT-RJ connectors, 50/125 or 62.5/125 micron multimode fiber-optic cabling
● 1000BASE-SX, -LX/LH, -T SFP-based port: LC fiber connectors, single-mode or multimode fiber, and RJ-45
connector for copper
● Management console port: Use RJ-45-to-DB9 cable for PC connections
● The internal power supply is an autoranging unit, supporting input voltages between 100 and 240 volts alternating
current (VAC)
● Use the supplied AC power cord to connect the AC power connector to an AC power outlet
● Per-port status LEDs: link integrity, disabled, activity, speed, and full-duplex indications
● System-status LED
● (H x W x D) 1.55 x 10.6 x 6.42 in.
● (3.94 x 26.92 x 16.3 cm)
3 lb (1.36 kg)
● Operating temperature 32 to 113° F (0 to 45° C)
● Storage temperature -13 to 158° F (-25 to 70° C)
● Operating humidity 10 to 85% (noncondensing)
● Operating altitude up to 10,000 ft (3000 m)
● Storage altitude up to 15,000 ft (4570 m)
● International Organization for Standardization (ISO) 7779:
● bystander position operating to an ambient temperature of 30° C: 0 decibels (dB)
● 2940-8TF: CNMEG00ARA
● 2940-8TT: CNMEH00ARA
● 2940-8TF: 636,000 hrs (73 yrs)
● 2940-8TT: 771,000 hrs (88 yrs)
Limited lifetime warranty
Specification
● 15W (maximum)
● 50 Btus per hour
100 to 240 VAC (autoranging), 50 to 60 Hz
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