24-Port 10/100
+ 1-Port Gigabit Switch
+ 1 miniGBIC
Use this guide to install:
SR224G
User Guide
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Table of Contents
Chapter 1: Introduction
The 24-Port 10/100 + 1-Port Gigabit Switch + 1 miniGBIC
Features
Chapter 1: Introduction
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The 24-Port 10/100 + 1-Port Gigabit Switch + 1 miniGBIC
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This new Linksys rackmount switch delivers non-blocking, wire speed switch-
ing for your 10, and 100 megabit network clients, plus multiple options for con-
necting to your network backbone. Twenty-four 10/100 ports wire up your
workstations, while the integrated 10/100/1000BaseTX port connects to the
backbone at Gigabit speeds. And the mini GBIC port allows future expansion
to alternate transmission media like optical fiber.
Chapter 2: Getting to Know the 24-Port 10/100
+ 1-Port Gigabit Switch + 1 miniGBIC
Front Panel LEDs and Ports
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Back Panel Port
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It features non-blocking, wire-speed switching that forwards packets as fast as
your network can deliver them. Also included are Address Learning and Aging
to prevent data transfer errors and Data Flow Control to help prevent packet
collisions. The switch provides broadcast storm suppression, has hardware
MAC and IP address learning, and supports packet filtering and port security.
Chapter 3: Connecting the 24-Port 10/100
+ 1-Port Gigabit Switch + 1 miniGBIC
Overview
Connecting Network Devices
Placement Options
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All ports have automatic MDI/MDI-X crossover detection, so you don't have to
worry about the cable type. Each port independently and automatically negoti-
ates for best speed and whether to run in half- or full-duplex mode. Head-of-
line blocking prevention keeps your high-speed clients from bogging down in
lower-speed traffic and fast store-and-forward switching prevents damaged
packets from being passed on into the network.
Appendix A: Glossary
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Appendix B: Specifications
Environmental
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Appendix C: Warranty Information
Appendix D: Contact Information
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No matter how intensive your network demands, the Linksys 24-Port 10/100 +
1-Port Gigabit Switch + 1miniGBIC has speed, flexibility, and reliability that
you can count on.
Features
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Ideal for Integrating Your 10BaseT and 100BaseTX Network Hardware
24 10/100 Ports Provide Dedicated Bandwidth in Half or Full-Duplex
Modes
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1 Gigabit Ethernet Port and 1 Mini-GBIC Slot for Gigabit Fiber expansion
Each port supports Auto MDI/MDI-X cable detection
Compatible with All Major Network Operating Systems
Advanced Store-and-Forward Packet Switching Optimizes Data Transfers
Auto Partitioning Protects PCs from Downed Network Lines
Signal Regeneration Ensures Data Transfer Integrity
Free Technical Support—24 Hours a Day, 7 Days a Week, Toll-Free US
Calls
•
Limited Lifetime Warranty
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mini-GBIC
The mini-GBIC (gigabit interface converter) port is a con-
nection point for a mini-GBIC module, so the Switch can be
uplinked via fiber to another switch. The mini-GBIC port is
compatible with two types of modules, 850 nm and 1310 nm.
Chapter 2: Getting to Know the
24-Port 10/100 + 1-Port Gigabit
Switch + 1 miniGBIC
Back Panel Port
Front Panel LEDs and Ports
Figure 2-2
The power port is located on the back panel of the Switch.
Figure 2-1
(power)
The power port is where you will connect the included power
cord.
The LEDs and network ports are located on the front panel of the Switch. All
network ports are independent, so you can use all of them simultaneously.
LEDS
System
Green. The System LED will light up when the Switch is
powered on.
1-24
Green. Each LED will light up when there is a connection
made through its corresponding port. It will flash when there
is activity on its corresponding port.
G1
G2
Green. The G1 LED will light up when there is a connection
made through the Gigabit port. It will flash when there is
activity on the Gigabit port.
Green. The G2 LED will light up when there is a connection
made through the miniGBIC port. It will flash when there is
activity on the miniGBIC port.
Ports
1-24
These 10/100 ports are connection points for PCs and other
network devices, such as additional switches.
Gigabit
This 10/100/1000 port is a connection point for a network
device, such as a Gigabit server.
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Connecting Network Devices
Chapter 3: Connecting the 24-Port
10/100 + 1-Port Gigabit Switch
+ 1 miniGBIC
To connect network devices to the Switch, follow these instructions:
1. Make sure all the devices you will connect to the Switch are powered off.
2. Connect a Category 5 Ethernet network cable to one of the numbered ports
on the Switch.
Overview
This chapter will explain how to connect network devices to the Switch. For an
example of a typical network configuration, see the application diagram shown
in Figure 3-1.
Figure 3-2
3. Connect the other end to a PC or other network device.
4. Repeat steps 2 and 3 to connect additional devices.
5. If you are using the Gigabit port, connect a Category 5e Ethernet network
cable to the Gigabit port on the Switch, and connect the other end to a
Gigabit server or other network device.
6. If you are using the mini-GBIC port, then connect the mini-GBIC module
to the mini-GBIC port. For detailed instructions, refer to the module’s doc-
umentation.
Figure 3-1
When you connect your network devices, make sure you don’t exceed the max-
imum cabling distances, which are listed in the following table:
Note: The mini-GBIC port is compatible with two types of mini-
GBIC modules, 850 nm and 1310 nm.
Maximum Cabling Distances
7. Connect the supplied power cord to the Switch’s power port, and plug the
other end into an electrical outlet.
From
Switch
To
Switch or Hub*
Hub
Maximum Distance
100 meters (328 feet) 1
5 meters (16.4 feet) 1
Hub
8. Power on the devices connected to the Switch. Each active port’s corre-
sponding LED will light up on the Switch.
100 meters (328 feet) 1
Switch or Hub
Computer
*A hub refers to any type of 100Mbps hub, including regular hubs and stackable hubs. A 10Mbps hub
connected to another 10Mbps hub can span up to 100 meters (328 feet).
Proceed to the following section, “Placement Options.”
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Placement Options
Appendix A: Glossary
There are two ways to physically install the Switch:
10BaseT - An Ethernet standard that uses twisted wire pairs.
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set the Switch on its four rubber feet
mount the Switch in a standard-sized, 1U high rack.
100BaseTX - IEEE physical layer specification for 100 Mbps over two pairs of
Category 5 UTP or STP wire.
For rack-mounting, the Switch has four mounting holes located on each side.
Place the Switch in the rack, and secure it with screws.
1000Base-T - Provides half-duplex and full-duplex 1000Mbps Ethernet service
over Category 5 links as defined by ANSI/TIA/EIA-568-A. Topology rules for
1000Base-T are the same as those used for 100BaseT. Category 5 link lengths
are limited to 100 meters by the ANSI/TIA/EIA-568-A cabling standard.
Congratulations! The installation of the 24-Port 10/100 + 1-Port Gigabit
Switch + 1 miniGBIC is complete.
Auto MDI/MDI-X - On a network hub or switch, an auto MDI/MDI-X port
automatically senses if it needs to act as a MDI or MDI-X port. The auto-
MDI/MDI-X capability eliminates the need for crossover cables.
Auto-negotiate - To automatically determine the correct settings. The term is
often used with communications and networking. For example, Ethernet
10/100 cards, hubs and switches can determine the highest speed of the node
they are connected to and adjust their transmission rate accordingly.
CAT 5 - ANSI/EIA (American National Standards Institute/Electronic
Industries Association) Standard 568 is one of several standards that specify
“categories” (the singular is commonly referred to as “CAT”) of twisted pair
cabling systems (wires, junctions, and connectors) in terms of the data rates
that they can sustain. CAT 5 cable has a maximum throughput of 100 Mbps and
is usually utilized for 100BaseTX networks.
CAT 5e - The additional cabling performance parameters of return loss and far-
end crosstalk (FEXT) specified for 1000BASE-T and not specified for
10BASE-T and 100BASE-TX are related to differences in the signaling imple-
mentation. 10BASE-T and 100BASE-TX signaling is unidirectional-signals
are transmitted in one direction on a single wire pair. In contrast, Gigabit
Ethernet is bi-directional-signals are transmitted simultaneously in both direc-
tions on the same wire pair; that is, both the transmit and receive pair occupy
the same wire pair.
Ethernet - IEEE standard network protocol that specifies how data is placed
on and retrieved from a common transmission medium. Has a transfer rate of
10 Mbps. Forms the underlying transport vehicle used by several upper-level
protocols, including TCP/IP and XNS.
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Fast Ethernet - A 100 Mbps technology based on the 10Base-T Ethernet
CSMA/CD network access method.
Appendix B: Specifications
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.
Model Number
Standards
Ports
SR224G
IEEE 802.3, 802.3u, 802.3x, 802.3ab
Mbps (Megabits per second) - One million bits per second; unit of measure-
ment for data transmission.
24 RJ-45 10/100/1000, 1 10/100/1000 Port,
and 1 mini-GBIC Port
MDI (Medium Dependent Interface) - 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.
Cabling Type
LEDs
Cat5, Multi-Mode fiber 1310 nm and 850 nm
supported
MDI-X (Medium Dependent Interface 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.
System, 1-24, G1, G2
Environmental
Network - A system that transmits any combination of voice, video and/or data
between users.
Dimensions
17.01" x 1.75" x 13.74"
(432 mm x 44.5 mm x 349 mm)
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.
Unit Weight
Power
7.98 lbs. (3.621 kg)
110-120V AC, 30 W
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.
Certifications
Operating Temp.
Storage Temp.
FCC Class B, CE
0ºC to 50ºC (32ºF to 122ºF)
-40ºC to 70ºC (-40ºF to 158ºF)
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.
Operating Humidity 20% to 95%, Non-Condensing
Storage Humidity 5% to 95%, Non-Condensing
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Appendix C: Warranty Information
Appendix D: Contact Information
BE SURE TO HAVE YOUR PROOF OF PURCHASE AND A BARCODE
FROM THE PRODUCT’S PACKAGING ON HAND WHEN CALLING.
RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF
PURCHASE.
For help with the installation or operation of this 24-Port 10/100 + 1-Port
Gigabit Switch + 1 miniGBIC, contact Linksys Technical Support at one of the
phone numbers or Internet addresses below.
Sales Information
Technical Support
RMA (Return Merchandise
Authorization) Issues
Fax
E-mail
Web
FTP Site
800-546-5797 (LINKSYS)
800-326-7114
IN NO EVENT SHALL LINKSYS’S LIABILITY EXCEED THE PRICE
PAID FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCI-
DENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE
USE OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR ITS
DOCUMENTATION. LINKSYS DOES NOT OFFER REFUNDS FOR ANY
PRODUCT.
949-265-6655
ftp.linksys.com
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CESSING AND RECEIVING YOUR REPLACEMENT. LINKSYS PAYS
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