Catalyst 2940 Desktop, 2955 Industrial Ethernet Series, 2948G-GE-TX

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Catalyst 2940 Desktop, 2955 Industrial Ethernet Series, 2948G-GE-TX

Feature WS-C2940-8TT / WS-C2940-8TT-S WS-C2940-8TF / WS-C2940-8TF-S WS-C2955T-12 WS-C2955C-12 WS-C2955S-12 WS-C2948G-GE-TX
Form Factor Desktop Desktop Special (see Dimensions, below) Special (see Dimensions, below) Special (see Dimensions, below) 1RU
Switch Fabric 3.2Gbps 3.2Gbps 13.6Mbps 13.6Mbps 13.6Mbps 20Gbps
Forwarding Rate 2.7Mpps 2.7Mpps 4.8Mpps 2.0Mpps 2.0Mpps 29.76Mpps
10/100 Ports (RJ-45) 8 8 12 12 12 0
10/100/1000 (RJ-45) 1 0 2 0 0 48
100M MM Fiber (MTRJ) 0 1 0 2 0 0
100M SM Fiber (LC) 0 0 0 0 2 0
SFP GE Ports 0 1 0 0 0 4
External Relay Ports N/A N/A 2 2 2 0
VLAN Trunking 802.1q, 4 max. 802.1q, 4 max. VLAN's 802.1q VLAN's 802.1q VLAN's 802.1q VLAN's 802.1q
EtherChannel All Ports All Ports All Ports All Ports All Ports All Ports
Voice-VLAN's Yes Yes Yes Yes Yes Yes
Multi-VLAN Capable No No No No No No
Max. MAC Addresses 8000 8000 8000 8000 8000 16000
Max. MTU 1500 Bytes 1500 Bytes 1500 Bytes 1500 Bytes 1500 Bytes 1522 Bytes
Multicast IGMP Snooping in hardware (255 groups, max) IGMP Snooping in hardware (255 groups, max) IGMP Snooping in hardware (255 groups, max) IGMP Snooping in hardware (255 groups, max) IGMP Snooping in hardware (255 groups, max) IGMP Snooping in hardware (255 groups, max)
Ingress Policing None None 6 policers per 10/100/100FX port, 60 policers per 1000 port 6 policers per 10/100/100FX port, 60 policers per 1000 port 6 policers per 10/100/100FX port, 60 policers per 1000 port N/A
Queues per port 4 4 4 4 4 2
QoS Granularity N/A N/A 1Mbps (10/100/100FX ports), 8Mbps (1000 ports) 1Mbps (10/100/100FX ports), 8Mbps (1000 ports) 1Mbps (10/100/100FX ports), 8Mbps (1000 ports) N/A
DSCP/CoS Remark. No No Yes Yes Yes Yes
Heat (W), Max. 15 15 23 23 23 130
Heat (BTU), Max. 50 50 102 102 102 445
Dimensions (H/W/D) 1.55 x 10.6 x 6.42 in. (3.94 x 26.92 x 16.3 cm) 1.55 x 10.6 x 6.42 in. (3.94 x 26.92 x 16.3 cm) 3.75 x 8.07 x 5.03 in. (9.52 x 20.5 x 12.77 cm) 3.75 x 8.07 x 5.03 in. (9.52 x 20.5 x 12.77 cm) 3.75 x 8.07 x 5.03 in. (9.52 x 20.5 x 12.77 cm) 1.73 x 17.5 x 17 in (4.39 x 44.5 x 43.1 cm)
Operating Temp. 32 to 113°F (0 to 45°C) 32 to 113°F (0 to 45°C) -40 to 140°F (-40 to 60°C) -40 to 140°F (-40 to 60°C -40 to 140°F (-40 to 60°C 32 to 113°F (0 to 45°C)
Storage Temp. -13 to 158°F (-25 to 70°C) -13 to 158°F (-25 to 70°C) -40 to 185°F (-40 to 85°C) -40 to 185°F (-40 to 85°C) -40 to 185°F (-40 to 85°C) -13 to 158°F (-25 to 70°C)
Relative Humidity 10 to 85% (noncondensing) 10 to 85% (noncondensing) 10 to 95% (noncondensing) 10 to 95% (noncondensing) 10 to 95% (noncondensing) 10 to 85% (noncondensing)
Shock N/A N/A 50 g at 11ms 50 g at 11ms 50 g at 11ms N/A
Vibration N/A N/A 500Hz (meets or exceeds MIL-STD-810, Method 514.4) 500Hz (meets or exceeds MIL-STD-810, Method 514.4) 500Hz (meets or exceeds MIL-STD-810, Method 514.4) N/A
Operating Altitude Up to 10,000 ft (3000 m) Up to 10,000 ft (3000 m) Up to 10,000 ft (3000 m) Up to 10,000 ft (3000 m) Up to 10,000 ft (3000 m) Up to 10,000 ft (3000 m)
Storage Altitude Up to 15,000 ft (4570 m) Up to 15,000 ft (4570 m) Up to 30,000 ft (9000 m) Up to 30,000 ft (9000 m) Up to 30,000 ft (9000 m) Up to 15,000 ft (4570 m)
Weight 3 lb (1.36 Kg) 3 lb (1.36 Kg) 3.1 lbs (1.41 Kg) 3.1 lbs (1.41 Kg) 3.1 lbs (1.41 Kg) 13 lb (5.9kg)
DC Power Req's N/A N/A 24 V (18 V minimum to 32 V maximum range) 24 V (18 V minimum to 32 V maximum range) 24 V (18 V minimum to 32 V maximum range) N/A
MTBF (Hours) 771 636 235,022 206,378 205,115 146,28