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

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