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3com SuperStack® II Dual Speed Hub 500 24-Port 3C16611-ME Scheda Tecnica

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Specifications
SuperStack II Dual Speed Hub 500 and PS Hub Family
Dimensions and Weight
Dual Speed Hub 500
Height: 44 mm (1U or 1.7 in)
Width: 440 mm (17.3 in)
Depth: 310 mm (12.2 in)
Weight: 
12-port—2.6 kg (5.6 lb)
24-port—2.7 kg (5.8 lb)
PS Hub 40
Height: 44 mm (1U or 1.7 in)
Width: 440 mm (17.3 in)
Depth: 168 mm (6.6 in)
Weight: 
12-port—2 kg (4.4 lb)
24-port—2.1 kg (4.6 lb)
PS Hub 50 
Height: 44 mm (1U or 1.7 in)
Width: 440 mm (17.3 in)
Depth: 168 mm (6.6 in)
Weight: 
24-port—2.2 kg (4.8 lb)
Mounting
Includes hardware for mounting
in a standard 19-inch rack.
Connections and Cables
12 or 24 RJ-45 ports supporting
10BASE-T transmission over two
pairs of Category 3, 4, or 5 UTP
cable, or 100BASE-TX transmis-
sion over two pairs of Category 5
UTP/STP cable
Power Requirement
Dual Speed Hub 500
Power Inlet: IEC 320
AC Line Frequency: 40 to 63 Hz 
Input Voltage Options: 80 to 264
VAC RMS
Fuse Protection: 5 A
PS Hub 40/50
Power Inlet: IEC 320
AC Line Frequency: 50 to 60 Hz 
Input Voltage Options: 85 to 264
VAC RMS
Fuse Protection: 2 A
Power consumption:
Dual Speed Hub 500 
12-port: 38 W
24-port: 49 W
PS Hub 40 
12-port: 26 W
24-port: 29 W
PS Hub 50 
24-port: 35 W
Heat dissipation/hour:
Dual Speed Hub 500 
12-port: 130 BTU
24-port: 167 BTU
PS Hub 40 
12-port: 90 BTU
24-port: 103 BTU
PS Hub 50 
24-port: 124 BTU
Indicators
Per Unit LEDs: Power status,
management/attention
Per Segment LEDs:
Collision/activity
Per Port LEDs: Partition, link
status
Standards Compliance
IEEE 802.3µ 100BASE-T com-
pliant
IEEE 802.3µ 10BASE-T compliant
Dual Speed Hub 500: 100 Mbps
baseband CSMA/CD standard
(complies with IEEE standard
Class II repeater)*
*The Dual Speed Hub 500
achieves this only as a stand-
alone product, not as part of a
stack.
Functional
ISO/IEC 8802-3
IEEE 802.3 (Ethernet)
IEEE 802.3u (Fast Ethernet)
IEEE 802.1D (Bridging)
Safety
UL 1950
CSA-C22.2 No. 950
EN 60950
Electromagnetic Compatibility
Dual Speed Hub 500
EN 55022 Class A
FCC Part 15 Class A
VCCI Class 2
EN 50082-1
ICE-003 Class A;
As in 2S 3548
PS Hub 40/50
FCC Part 15 Class A
EN 50082-1 (IEC 801 2-5)
VFG 243
EN 55022 Level B
CSA 108.8
EN 61000-3-2
Network Management 
Standards
Protocols
SNMP
RFC 1157
ARP
RFC 826
IP
RFC 791
ICMP
RFC 792
UDP
RFC 768
TCP
RFC 793
TFTP
RFC 783
SLIP
RFC 1055
MIBs
MIB II 
RFC 1213
MAU 
RFC 1515
RS 232 
RFC 1659 
(Dual Speed Hub 500 only)
RMON 
RFC 1757
RMON-2 
RFC 2021 
(Dual Speed Hub 500 only)
Repeater RFC 2108
Switch Performance
Dual Speed Hub 500
4 K maximum addresses
Learning rate: 50 addresses/
second maximum
Aging period default: 5 days
Filtering: 163,680 frames/
second
Forwarding:
10 Mbps ➞ 100 Mbps:
14,880 frames/second
100 Mbps ➞ 10 Mbps:
14,800 frames/second
Latency (store and forward
only): ≤ 40 µS
PS Hub 50
512 maximum addresses
Forwarding:
10 Mbps ➞ 10 Mbps:
14,800 frames/second
10 Mbps ➞ 100 Mbps Downlink:
14,800 frames/second
100 Mbps Downlink ➞ 10 Mbps: 
14,800 frames/second
Latency (store and forward
only): 8 µS
3Com +5 Lifetime Limited
Warranty
If a hub (including power supply
and fan) should fail during its
first five years, return the faulty
unit to 3Com for repair, and
3Com will send you a replace-
ment unit. This procedure
minimizes downtime and
ensures that the network is back
up fast. After five years, 3Com’s
standard lifetime limited war-
ranty applies, giving you peace
of mind for the rest of the hub’s
lifetime (excluding power
supply and fan).