Specifications of the Extreem networks 48i: 
10/100Base-TX Ports 48
1000Base-SX Ports 2
Redundant PHY Port 2
GBIC modules Yes
Auto-negotiate full/half duplex Yes
Auto-negotiate 10/100Base-TX Yes
Layer 2 MAC Address Support 128,000
Layer 3 Routes 64,000
QoS Flows 32,000
Internal Bandwidth 32 Gb/s
Internal Throughput 17.5 Gb/s
Buffer memory 4MB Dynamic
Average Latency 3 to 6m S
L2 Forwarding Rate 10.1 Mp/s
L3 Forwarding Rate 10.1 Mp/s
Port Trunking 2 or 4 port groups
Automatic Load Balancing (ALB) support Yes
Hunt Groups Yes
802.1Q VLAN Tagging Yes
802.1p Priority Yes
VLANs 256 per Switch
Layer 3 IP Routing Yes
Quality of Service Yes
Management Software Included
SNMP Yes
RMON Agent Groups 1-4
Web-based Management Yes
TELNET and VT-100 CLI Yes
802.1d Spanning Tree 64 Instances
Regulatory Testing
Emission FCC p.15, Class A/CISPR22 Class A
CSA C108.8-M11983 (A)
EN55022 Class B
VCCI Class 2
Immunity IEC 801-2 (Electrostatic Discharge)
IEC 801-3 (Radiated Immunity)
IEC 801-4 (Electrical Fast Transient/Burst)
EN55101-4 (Conducted Immunity)
Safety UL 1950, 3rd ed.
CAN/CSA C22.2 No. 950
TÜV GS mark
EN 60950/1988:1992/A3:1995 +ZB/ZC Deviations
Russian GOST safety approval
RFC Compliance
RFC 1157 SNMP V1
RFC 1213 MIB II
RFC 1271 RMON (1,2,3&9)
RFC 1493 Bridge MIB
RFC 854 TELNET (1073,1372,860,858,857)
RFC791 IP (STD5)
RFC 792 ICMP (STD5)
RFC 768 UDP (STD6)
RFC 793/896 TCP (STD7)
RFC 1350 TFTP
RFC 951/1542 BootP
RFC 1058/1723 RIP/RIP-2
RFC 950/922 Sub-netting (STD5)
RFC 1122/1123 Host Requirements
RFC 1812 Router Requirements (Partial)
RFC 1571 RMON (Partial)
RFC 1515 Mau Mib (Partial)
Supported Cabling
Standard Type Full-Duplex Half-Duplex
10Base-T Category 3, 4, 5 100m 100m
100Base-TX Category 5 100m 100m
1000Base-SX 62.5 micron MMF 260m 260m
50 micron MMF 550m 260m
1000Base-LX 62.5 micron MMF 440m 320m
50 micron MMF 550m 320m
10 micron SMF 5000m 320m
Operating Environment
Temperature 32° to 104° F/0° to 40° C
Humidity 10% to 95% (non-condensing)
Altitude 0 to 10,000 ft / 0 to 3 km
Storage Environment
Temperature 14° to 158° F/ -10° to 70° C
Humidity 10% to 95% (non-condensing)
Altitude 0 to 30,000 ft / 0 to 9 km
Power Consumption
Power Supply 120 - 240 VAC/50 – 60Hz
Wattage Consumption 57W;BTU/hr = 195
Weight
Unit 20lbs, 9.07 kg
Shipping 25lbs, 11.34 kg
Dimensions (HxWxD)
Unit 3.5 x 17.32 x 17.32 in (2U)
Shipping 8.88 x 43.99 x 43.99 cm