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Appendix B: Specifications
Model Number
SR224G
Standards
IEEE 802.3, 802.3u, 802.3x, 802.3ab
Ports
24 RJ-45 10/100/1000, 1 10/100/1000 Port,
and 1 mini-GBIC Port
Cabling Type
Cat5, Multi-Mode fiber 1310 nm and 850 nm
supported
LEDs
System, 1-24, G1, G2
Dimensions
17.01" x 1.75" x 13.74"
(432 mm x 44.5 mm x 349 mm)
Unit Weight
7.98 lbs. (3.621 kg)
Power
110-120V AC, 30 W
Certifications
FCC Class B, CE
Operating Temp.
0ºC to 50ºC (32ºF to 122ºF)
Storage Temp.
-40ºC to 70ºC (-40ºF to 158ºF)
Operating Humidity
20% to 95%, Non-Condensing
Storage Humidity
5% to 95%, Non-Condensing
Fast Ethernet
- A 100 Mbps technology based on the 10Base-T Ethernet
CSMA/CD network access method.
Hub
- The device that serves as the central location for attaching wires from
workstations. Can be passive, where there is no amplification of the signals; or
active, where the hubs are used like repeaters to provide an extension of the
cable that connects to a workstation.
Mbps
(
M
ega
b
its
p
er
s
econd) - One million bits per second; unit of measure-
ment for data transmission.
MDI
(
M
edium
D
ependent
I
nterface) - On a network hub or switch, a MDI port,
also known as an uplink port, connects to another hub or switch using a straight-
through cable. To connect a MDI port to a computer, use a crossover cable.
MDI-X
(
M
edium
D
ependent
I
nterface Crossed) - On a network hub or switch,
a MDI-X port connects to a computer using a straight-through cable. To con-
nect a MDI-X port to another hub or switch, use a crossover cable.
Network
- A system that transmits any combination of voice, video and/or data
between users.
Switch
- 1. A data switch connects computing devices to host computers, allow-
ing a large number of devices to share a limited number of ports. 2. A device for
making, breaking, or changing the connections in an electrical circuit.
Topology
- A network’s topology is a logical characterization of how the
devices on the network are connected and the distances between them. The
most common network devices include hubs, switches, routers, and gateways.
Most large networks contain several levels of interconnection, the most impor-
tant of which include edge connections, backbone connections, and wide-area
connections.
UTP
- Unshielded twisted pair is the most common kind of copper telephone
wiring. Twisted pair is the ordinary copper wire that connects home and many
business computers to the telephone company. To reduce crosstalk or electro-
magnetic induction between pairs of wires, two insulated copper wires are twist-
ed around each other. Each signal on twisted pair requires both wires. Since
some telephone sets or desktop locations require multiple connections, twisted
pair is sometimes installed in two or more pairs, all within a single cable.
Environmental
