Product specifications

All contents are Copyright © 1992–2006 Cisco Systems, Inc. All rights reserved. This document is Cisco Public Information. Page 8 of 12
Table 2. Hardware Specifications
Description Specification
Performance

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
100BASE-FX fiber-port
power levels

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
Connectors and cabling

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
Power connectors

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
Indicators

Per-port status LEDs: link integrity, disabled, activity, speed, and full-duplex indications

System-status LED
Dimensions

(H x W x D) 1.55 x 10.6 x 6.42 in.

(3.94 x 26.92 x 16.3 cm)
Weight 3 lb (1.36 kg)
Environmental Ranges

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)
Acoustic Noise

International Organization for Standardization (ISO) 7779:

bystander position operating to an ambient temperature of 30° C: 0 decibels (dB)
Telco CLEI Code

2940-8TF: CNMEG00ARA

2940-8TT: CNMEH00ARA
Mean Time Between Failure
(MTBF)—Predicted

2940-8TF: 636,000 hrs (73 yrs)

2940-8TT: 771,000 hrs (88 yrs)
Warranty Limited lifetime warranty
Table 3. Power Specifications
Description Specification
Power Consumption

15W (maximum)

50 Btus per hour
AC input voltage/frequency 100 to 240 VAC (autoranging), 50 to 60 Hz