Allied Telesis Switch AT GS900 16 User Manual

Gigabit eco-friendly  
Ethernet Switches  
AT-GS900/16  
AT-GS900/24  
Installation Guide  
613-001351 Rev. A  
 
Electrical Safety and Emissions Standards  
This product meets the following standards.  
U.S. Federal Communications Commission  
Radiated Energy  
Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15  
of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the  
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency  
energy and, if not installed and used in accordance with this instruction manual, may cause harmful interference to radio  
communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case  
the user will be required to correct the interference at his own expense.  
Note: Modifications or changes not expressly approved of by the manufacturer or the FCC, can void your right to operate  
this equipment.  
Industry Canada  
This Class A digital apparatus complies with Canadian ICES-003.  
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.  
European Union Restriction of the Use of Certain Hazardous Substances  
(RoHS) in Electrical and Electronic Equipment  
This Allied Telesis RoHS-compliant product conforms to the European Union Restriction of the Use of Certain Hazardous  
Substances (RoHS) in Electrical and Electronic Equipment. Allied Telesis ensures RoHS conformance by requiring  
supplier Declarations of Conformity, monitoring incoming materials, and maintaining manufacturing process controls.  
RFI Emissions FCC Class A  
CISPR 22 Class A  
EN55022 Class A: 2006+A1:2007 version  
Warning: In a domestic environment this product may cause radio interference in  
which case the user may be required to take adequate measures.  
Immunity  
EN55024  
Electrical Safety  
UL – USA (UL60950-1)  
LVD (EN60950-1, 2nd edition)  
CSA or cUL – Canada  
C-Tick – Australia  
CE Mark  
3
 
Translated Safety Statements  
Important: The symbol indicates that a translation of the safety statement is available in a PDF  
document titled “Translated Safety Statements”. This is posted on the Allied Telesis website at  
http://www.alliedtelesis.com/support/software/. Refer to “Where to Find Web-based Product  
Documentation” on page 13 to navigate to this document.  
4
 
Contents  
Preface ............................................................................................................................................................ 11  
5
 
Contents  
6
 
Figures  
7
 
Figures  
8
 
List of Tables  
10  
 
Preface  
This guide contains instructions on how to install the AT-GS900/16 and  
AT-GS900/24 Gigabit Ethernet Switches. This preface contains the  
following sections:  
11  
 
 
Preface  
Safety Symbols Used in this Document  
This document uses the safety symbols defined in Table 1.  
Table 1. Safety Symbols  
Symbol Meaning  
Description  
Caution  
Performing or omitting a specific action may  
result in equipment damage or loss of data.  
Warning  
Performing or omitting a specific action may  
result in electrical shock.  
12  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Where to Find Web-based Guides  
The product documentation for all Allied Telesis products are available in  
portable document format (PDF) on our web site. Go to  
Enter your hardware product model in the Search by Product Name  
field; for example, enter AT-GS900/16 or AT-GS900/24. You can view the  
documents online or download them onto your local workstation or server.  
13  
 
 
Preface  
Contacting Allied Telesis  
This section provides Allied Telesis contact information for technical  
support as well as sales and corporate information.  
Online Support You can request technical support online by accessing the Allied Telesis  
Knowledge Base: www.alliedtelesis.com/support/kb.aspx. You can use  
the Knowledge Base to submit questions to our technical support staff and  
review answers to previously asked questions.  
Email and For Technical Support via email or telephone, refer to the Support &  
Services section of the Allied Telesis web site: www.alliedtelesis.com.  
Select your country from the list displayed on the website. then select the  
appropriate menu tab.  
Telephone  
Support  
Returning Products for return or repair must first be assigned a return materials  
authorization (RMA) number. A product sent to Allied Telesis without an  
RMA number will be returned to the sender at the sender’s expense.  
Products  
To obtain an RMA number, contact the Allied Telesis Technical Support  
group at our web site: www.alliedtelesis.com/support/rma. Select your  
country from the list displayed on the website. Then select the appropriate  
menu tab.  
Sales or You can contact Allied Telesis for sales or corporate information through  
our web site: www.alliedtelesis.com. To find the contact information for  
your country, select Contact Us -> Worldwide Contacts.  
Corporate  
Information  
Warranty Go to www.alliedtelesis.com/support/warranty for specific terms and  
conditions of the warranty and for warranty registration for the  
AT-GS900/16 or AT-GS900/24 switch.  
Management New releases of management software for our managed products are  
available on our Allied Telesis web site at  
Software Updates  
navigating to this information.  
14  
 
               
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
15  
 
Chapter 1  
Product Description  
The AT-GS900/16 and AT-GS900/24 switches are low operating power,  
unmanaged, Layer 2 Fanless Gigabit Ethernet switches designed to  
simplify the task of creating or expanding an Ethernet, Fast Ethernet, or  
Gigabit Ethernet network.  
This chapter contains the follows sections:  
16  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Features  
AT-GS900/16 and AT-GS900/24 Gigabit eco-friendly Ethernet switches  
features include:  
ˆ Silent fanless operation  
ˆ Power saving port features on each port including:  
Cable Length detection and power minimization  
Link-Down power savings  
ˆ LED disable mode  
ˆ 16 or 24 x 10/100/1000Mbps auto-sensing, switching ports  
ˆ MAC address table:  
AT-GS900/16: Up to 8K MAC address table  
AT-GS900/24: Up to 16K MAC address table  
ˆ Packet Buffer  
AT-GS900/16: 2 Mb  
AT-GS900/24: 3.5 Mb  
ˆ Back pressure for half-duplex operation  
ˆ IEEE 802.3x flow control for full duplex operation  
ˆ Support for Jumbo Frames up to 9216 Bytes  
ˆ Wire speed performance  
ˆ Non-blocking architecture  
ˆ Auto-negotiation Gigabit ports  
ˆ Auto MDI/MDI-X  
ˆ Transparent to VLAN tagged packets  
ˆ Rack Mount Brackets able to turn 90 degrees for Wall mount  
ˆ 1U chassis high  
ˆ Internal power supply  
17  
 
 
Chapter 1: Product Description  
Components  
Figure 1 illustrates the front panels of the AT-GS900/16 and AT-GS900/24  
switches.  
AT-GS900/16  
AT-GS900/16  
16 Port 10/100/1000Base-T Gigabit Ethernet Switch  
1000 LINK  
ACT  
10/100 LINK  
7
ACT  
9
FDX  
11  
HDX  
COL  
13  
1
3
5
15  
1
3
5
7
9
11 13 15  
POWER  
2
4
6
8
10 12 14 16  
2
4
6
8
10  
12  
14  
16  
1896  
16 - 10/100/1000Base Twisted Pair Ports  
System / Port LEDS  
AT-GS900/24  
AT-GS900/24  
24 Port 10/100/1000Base-T Gigabit Ethernet Switch  
1000 LINK  
ACT  
10/100 LINK  
11  
ACT  
13  
FDX  
15  
HDX  
COL  
1
3
5
7
9
17  
19  
21  
23  
1
3
5
7
9
11 13 15 17 19 21 23  
POWER  
2
4
6
8
10 12 14 16 18 20 22 24  
2
4
6
8
10  
12  
14  
16  
18  
20  
22  
24  
1897  
System / Port LEDS  
24 - 10/100/1000Base Twisted Pair Ports  
Figure 1. Front Panels  
Figure 2 illustrates the back panels of the AT-GS900/16 and AT-GS900/24  
switches.  
AT-GS900/16  
100-240~ VA C  
1899  
AC Power Connector  
AT-GS900/24  
100-240~ VA C  
1899  
AC Power Connector  
Figure 2. Back Panels  
18  
 
     
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Hardware Feature Description  
The following sections describe hardware features of the AT-GS900/16  
and AT-GS900/24 Fanless Gigabit Ethernet switches:  
ˆ System and Port LEDs  
ˆ Twisted Pair Ports  
ˆ AC Power Connector  
Twisted Pair The AT-GS900/16 Fanless Gigabit Ethernet switch features 16 twisted  
pair ports, and the AT-GS900/24 Fanless Gigabit Ethernet switch features  
24 twisted pair ports.  
Ports  
Type of Connector  
The twisted pair ports feature 8-pin RJ-45 connectors. (For the port  
Speed  
Each port is 10/100/1000Base-T compliant and is capable of 10, 100, or  
1000 Mbps speed, respectively. The ports are IEEE 802.3u Auto-  
Negotiation compliant. With Auto-Negotiation, the switch automatically  
matches the highest possible common speed between each switch port  
and each end-node. For example, if an end-node is capable of only 10  
Mbps, the switch sets the port connected to the end-node to 10 Mbps.  
Duplex Mode  
Each twisted pair port on the switch can operate in either half- or full  
duplex mode. The twisted pair ports are IEEE 802.3u-compliant and will  
Auto-Negotiate the duplex mode setting.  
Note  
For the switch to set the duplex mode for each port correctly, the  
end-nodes that you connect to the switch ports should also use  
Auto-Negotiation. Otherwise, a duplex mode mismatch can occur,  
affecting network performance. For further information, refer to  
19  
 
   
Chapter 1: Product Description  
Maximum Distance  
Each twisted pair port has a maximum operating distance of 100 m  
(328 feet).  
Type of Cabling  
For 10 Mbps operation, Category 3 or better 100 ohm shielded or  
unshielded twisted pair cabling is required. For 100 or 1000 Mbps  
operation, Category 5 and Enhanced Category 5 (5E) 100 ohm shielded  
or unshielded twisted pair cabling is required.  
Auto MDI/MDI-X  
All of the ports on the switch are auto-MDI and IEEE 802.3ab-compatible.  
Since each port's speed and duplex mode are set through Auto-  
Negotiation, the port uses the auto-MDI feature to automatically configure  
itself as MDI or MDI-X when connected to an end-node. Consequently,  
you can use either a straight-through or crossover twisted pair cable when  
connecting any network device to a port.  
Green Power Saving Ports  
All Ethernet ports support the power saving functions including Link-Down  
and Cable Length power savings. The greatest power savings occur when  
all 8 ports’ linked status is down and the ports are inactive. The switch  
uses the most power when all 8 ports are linked up to via Ethernet cables  
that are the maximum length or 100 meters.  
When a link is not established on an individual port, the switch controller  
automatically reduces the power supplied to the port’s circuitry to an idle  
level. The greater the number of ports that are not linked up results in a  
greater cumulative power savings for the switch.  
When a link is established on an individual port, the power provided to the  
PHY circuitry is based on the length of the Ethernet cable that you connect  
to the port. Full power is provided to the port’s circuitry if the cable length  
is detected to be the maximum specified cable length or 100 m. If the  
cable length is shorter than this, the switch senses the cable length and  
reduces the available port power in proportion to the detected cable  
length. This feature provides power efficiencies for the port even when it is  
actively linked to another network device.  
20  
 
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
eco-friendly The eco-friendly switch on the front panel is multi-functional and shown in  
Figure 3. It may be used to enable all the port LEDs (out position) or  
conserve power by turning off the port LEDs (in position). The switch  
functions are described in Table 2.  
Switch  
POW  
1902  
Figure 3. eco-friendly Switch  
Table 2. eco-friendly Switch Functions  
Action  
Results  
OFF (Out position)  
All front panel LEDs are enabled.  
All front panel LEDs are disabled for power  
conservation with the exception of the POWER LED,  
which remains active at all times.  
ON (In position)  
LEDs The system and port LEDs on the front panel of the AT-GS900/16 and  
AT-GS900/24 switches display the switch and its port status information.  
See Figure 4. Each port has two LEDs.  
AT-GS900/16  
1
3
5
7
9
11 13 15  
POWER  
2
1
4
3
6
5
8
7
10 12 14 16  
1907  
AT-GS900/24  
9
11 13 15 17 19 21 23  
POWER  
2
4
6
8
10 12 14 16 18 20 22 24  
1908  
Figure 4. Port LEDs  
21  
 
         
Chapter 1: Product Description  
Table 3 describes the system and port LEDs on the AT-GS900/16 and  
AT-GS900/24 switches.  
Table 3. System and Port LEDs  
LED  
State  
Green  
Description  
POWER  
The switch is powered ON and operating  
normally.  
OFF  
The switch has no power.  
Solid Green A valid 1000 Mbps link is established on  
the port.  
Solid  
Orange  
A valid 10 or 100 Mbps link is  
established on the port.  
L/A  
Blinking  
Green  
A 1000 Mbps packet transmission and  
reception is in process on the port.  
Blinking  
Orange  
A 10/100 Mbps packet transmission and  
reception is in process on the port.  
OFF  
No link is established on the port.  
Solid Green A full-duplex link is established on the  
port.  
Blinking  
Green  
The port is experiencing a collision in  
half duplex mode.  
D/C  
OFF  
A half-duplex link is established on the  
port.  
AC Power Both the AT-GS900/16 and AT-GS900/24 switches have a single AC  
power supply socket on the back panel. To power ON or OFF the switch,  
you connect or disconnect the power cord.  
Connector  
See Figure 2 on page 18 for an illustration of the back panels. For the  
22  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Ethernet Switching Basics  
An Ethernet switch interconnects network devices, such as workstations,  
printers, routers, and other Ethernet switches, so that they can  
communicate with each other by sending and receiving Ethernet frames.  
MAC Address Every hardware device on your network has a unique MAC address. This  
address is assigned to the device by the device’s manufacturer. For  
Table  
example, when you install a Network Interface Card (NIC) in a computer  
so that you can connect it to the network, the NIC already has a MAC  
address assigned to it by its manufacturer.  
The AT-GS900/16 can store up to 8000 MAC addresses in its MAC  
address table and the AT-GS900/24 can store up to 16,000 entries. Each  
switch uses the table to store the MAC addresses of the network end-  
nodes connected to the ports, along with the port number on which each  
address was learned.  
A switch learns the MAC addresses of the end-nodes by examining the  
source address of each packet received on a port. It adds the address and  
port on which the packet was received to the MAC table (if the address  
has not already been entered in the table). The result is a table that  
contains all the MAC addresses of the devices that are connected to the  
switch’s ports, and the port number where each address was learned.  
When the switch receives a packet, it also examines the destination  
address and, by referring to its MAC address table, determines the port on  
which the destination end-node is connected. It then forwards the packet  
to the appropriate port and to the end-node. This increases network  
bandwidth by limiting each frame to the appropriate port where the  
intended end-node is located, freeing the other switch ports for receiving  
and transmitting data.  
If the switch receives a packet with a destination address that is not in the  
MAC address table, it floods the packet to all the ports on the switch.  
When the destination end-node responds, the switch adds its MAC  
address and port number to the table.  
If the switch receives a packet with a destination address that is on the  
same port on which the packet was received, it discards the packet without  
forwarding it on to any port. Since both the source end-node and the  
destination end-node for the packet are located on the same port on the  
switch, there is no reason for the switch to forward the packet.  
Duplex Mode Duplex mode refers to how an end-node receives and transmits data. If an  
end-node can either receive or transmit data, but not both simultaneously,  
23  
 
     
Chapter 1: Product Description  
the end-node is operating in what is referred to as half-duplex mode. If an  
end-node can both receive and transmit data simultaneously, the end-  
node is said to be operating in full-duplex mode. Naturally, an end-node  
capable of operating in full-duplex can handle data much faster than an  
end-node that can only operate in half-duplex mode.  
The twisted pair ports on the AT-GS900/16 and AT-GS900/24 switches  
can operate in half- or full-duplex mode for 10/100 Mbps and full-duplex  
for 1000 Mbps. They are IEEE 802.3u-compliant and use Auto-  
Negotiation to set the duplex mode setting for you automatically.  
Store and Both the AT-GS900/16 and AT-GS900/24 switches use store and forward  
as the method for receiving and transmitting frames. When a Ethernet  
Forward  
frame is received on a switch port, the switch does not retransmit the  
frame from the destination port until it has received the entire frame and  
stored the frame in a port buffer. It then examines the frame to determine if  
it is a valid frame. Invalid frames, such as fragments or runts, are  
discarded by the switch. This process insures that only valid frames are  
transmitted from the switch ports and that damaged frames are not  
propagated on your network.  
Backpressure and To maintain the orderly movement of data between the end-nodes, an  
Ethernet switch may periodically need to signal an end-node to stop  
Flow Control  
sending data. This can occur under several circumstances. For example, if  
two end-nodes are operating at different speeds, the switch, while  
transferring data between the end-nodes, might need to instruct the faster  
end-node to stop transmitting data to allow the slower end-node to catch  
up. An example of this would be when a server operating at 1000 Mbps is  
sending data to a workstation operating at only 100 Mbps.  
How a switch signals an end-node to stop transmitting data differs  
depending on the duplex mode of the end-node and switch port. A twisted  
pair port operating in half-duplex mode stops an end-node from  
transmitting data by forcing a collision. A collision on an Ethernet network  
occurs when two end-nodes attempt to transmit data using the same data  
link at the same time. A collision causes an end-node to stop sending  
data, wait for a brief period of time, and then retransmit the same data.  
Once the switch is ready to receive data again, the switch stops forcing  
collisions. This is referred to as backpressure.  
A port operating in full-duplex mode uses PAUSE frames, as specified in  
the IEEE 802.3x standard, to stop the transmission of data from an end-  
node. Whenever the switch wants an end-node to stop transmitting data, it  
issues this frame. The frame instructs the end-node to cease transmission  
for a period of time specified within the frame. The switch continues to  
issue PAUSE frames until it is ready again to receive data from the end-  
node. This is referred to as flow control.  
24  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
25  
 
Chapter 2  
Installation  
This chapter contains the following sections:  
ˆ “Enter your hardware product model in the Search by Product Name  
field; for example, enter AT-GS900/16 or AT-GS900/24. You can view  
the documents online or download them onto your local workstation or  
server.” on page 27  
26  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Reviewing Safety Precautions  
Please review the following safety precautions before you begin to install  
the switch or any of its components.The indicates that a translation of  
the safety statements is available in a PDF document titled “Translated  
Safety Statements”. This other product documentation is posted on the  
software/.  
Enter your hardware product model in the Search by Product Name field;  
for example, enter AT-GS900/16 or AT-GS900/24. You can view the  
documents online or download them onto your local workstation or server.  
Warning: To prevent electric shock, do not remove the cover.  
No user-serviceable parts inside. This unit contains hazardous  
voltages and should only be opened by a trained and qualified  
technician. To avoid the possibility of electric shock, disconnect  
electric power to the product before connecting or disconnecting  
the LAN cables. E1  
Warning: Do not work on equipment or cables during periods of  
lightning activity. E2  
Warning: To prevent electric shock, do not remove the cover.  
No user-serviceable parts inside. This unit contains hazardous  
voltages and should only be opened by a trained and qualified  
technician. To avoid the possibility of electric shock, disconnect  
electric power to the product before connecting or disconnecting  
the LAN cables. E3  
Warning: Do not work on equipment or cables during periods of  
lightning activity. E4  
Warning: Power cord is used as a disconnection device. To de-  
energize equipment, disconnect the power cord. E5  
Warning: Class I Equipment. This equipment must be earthed.  
The power plug must be connected to a properly wired earth  
ground socket outlet. An improperly wired socket outlet could  
place hazardous voltages on accessible metal parts. E6  
Pluggable Equipment. The socket outlet shall be installed near  
the equipment and shall be easily accessible. E7  
27  
 
 
Chapter 2: Installation  
Caution: Air vents must not be blocked and must have free  
access to the room ambient air for cooling. E8  
Warning: Operating Temperature. This product is designed for a  
maximum ambient temperature of 40° degrees C. E9  
All Countries: Install product in accordance with local and  
National Electrical Codes. E10  
Warning: Mounting of the equipment in the rack should be such  
that a hazardous condition is not created due to uneven  
mechanical loading. E27  
Warning: Reliable earthing of rack-mounted equipment should  
be maintained. Particular attention should be given to supply  
connections other than direct connections to the branch circuits  
(e.g., use of power strips). E37  
If installed in a closed or multi-unit rack assembly, the operating  
ambient temperature of the rack environment may be greater  
than the room ambient temperature. Therefore, consideration  
should be given to installing the equipment in an environment  
compatible with the manufacturer’s maximum rated ambient  
temperature (Tmra). E38  
Caution: Installation of the equipment in a rack should be such  
that the amount of air flow required for safe operation of the  
equipment is not compromised. E39  
Caution: The unit does not contain serviceable components.  
Please return damaged units for servicing. E42  
28  
 
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Selecting a Site for the Switch  
Observe the following requirements when choosing a site for your switch:  
ˆ If you plan to install the switch in an equipment rack, ensure that the  
rack is safely secured and that it will not tip over. Devices in a rack  
should be installed starting at the bottom, with the heavier devices  
near the bottom of the rack.  
ˆ If you are installing the switch on a table, ensure that the table is level  
and secure.  
ˆ The power outlet for the switch should be located near the unit and  
should be easily accessible.  
ˆ The site should provide for easy access to the ports on the front of the  
switch. This will make it easy for you to connect and disconnect cables,  
as well as view the switch’s LEDs.  
ˆ To allow proper cooling of the switch, air flow around the unit and  
through its vents on the side and rear should not be restricted.  
ˆ Do not place objects on top of the switch.  
ˆ Do not expose the switch to moisture or water.  
ˆ Ensure that the site is a dust-free environment.  
ˆ You should use dedicated power circuits or power conditioners to  
supply reliable electrical power to the network devices.  
29  
 
 
Chapter 2: Installation  
Planning the Installation  
Table 4 contains the cabling specifications for the twisted pair ports.  
Table 4. Twisted Pair Cabling and Distances  
Maximum  
Speed  
Type of Cable  
Operating  
Distance  
10 Mbps  
Category 3 or better 100-ohm  
shielded or unshielded twisted pair  
cable  
100 m (328 ft)  
100 m (328 ft)  
100 m (328 ft)  
100 Mbps  
Category 5 or Category 5E  
(Enhanced) 100-ohm shielded or  
unshielded twisted pair cable  
1000 Mbps  
Category 5 and Category 5E  
(Enhanced) 100-ohm shielded or  
unshielded twisted pair cable  
Note  
The twisted pair ports on the switch feature Auto-MDI when  
operating at either 10, 100, or 1000 Mbps. Each port is individually  
configured as MDI or MDI-X when connected to an end-node.  
Consequently, you can use either a straight-through or crossover  
twisted pair cable when connecting any network device to a twisted  
pair port on the switch. For example, a port operating at 10 or 100  
Mbps uses two pairs of twisted pair wiring while a port operating at  
1000 Mbps uses four pairs of twisted pair wiring.  
30  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Unpacking the Switch  
To unpack an AT-GS900/16 or an AT-GS900/24 switch, perform the  
following procedure:  
1. Remove all components from the shipping package.  
Note  
Store the packaging material in a safe location. You must use the  
original shipping material if you need to return the unit to Allied  
Telesis.  
2. Place the switch on a level, secure surface.  
3. Ensure the following hardware components are included in your switch  
package. If any item is missing or damaged, contact your Allied Telesis  
sales representative for assistance.  
ˆ One AT-GS900/16 or AT-GS900/24 Fanless Gigabit Ethernet  
switch  
ˆ Two rack/wall mounting brackets  
ˆ Eight flathead Phillips screws for mounting brackets to the switch  
ˆ Four screws and anchors for attaching the switch to the wall  
ˆ Four screws for attaching the switch to the rack  
ˆ Four self-adhesive rubber feet  
ˆ AC power cord  
31  
 
 
Chapter 2: Installation  
Installing the Switch on a Table or Desktop  
To install the switch on a table or desktop, perform the following  
procedure:  
1. Remove all the items from the packaging and store the packaging  
material in a safe place. In the event a problem occurs and you need  
to return the unit, please use as much of the original shipping material  
as possible.  
2. Attach the four self-adhesive rubber feet to the bottom of the switch, as  
shown in Figure 5.  
2 4  
2 2  
2 0  
1 8  
1 6  
1 4  
1 2  
1 0  
8
6
2
4
2 4 2 2 2 0 1 8 1 6 1 4 1 2 1 0  
8
7
6
5
2
1
4
3
W E  
P O  
R
3 2 1 2 9 1 7 1 5 1 3 1 1 1  
9
n e t S w i t c h  
t 1 r 0 o / 1 0 0 2 / 1 4 0 P 0 B a s e - T G i g a b i t E t h e r  
2 3  
2 1  
1 9  
1 7  
5 1  
3 1  
1
9
1
7
5
1
3
C O L  
H D X  
F D X  
T
A C  
1 0 / 1 0 0 T L I A N C K  
1 0 0 0 L I N K  
- G T S A 9 0 0 / 2 4  
1897  
Figure 5. Attaching the Rubber Feet  
3. Place the switch on a flat and secure surface, leaving ample space  
around the switch for ventilation.  
4. Connected the twisted pair cables to the twisted pair ports.  
When connecting a twisted pair cable to a port, observe the following  
guidelines:  
ˆ An RJ-45 connector should fit snugly into the port on the switch.  
The tab on the connector should lock the connector into place.  
ˆ Check that you are using the appropriate type of twisted pair  
for twisted pair cable specifications.  
ˆ Since the twisted pair port, when operating in Auto-Negotiation, is  
Auto MDI/MDI-X, you can use either a straight-through or  
crossover twisted pair cable to connect any type of network device  
to a port on the switch. If you disable Auto-Negotiation on the port,  
the port defaults to MDI-X.  
32  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
5. Apply AC power to the switch by plugging the power cord into the AC  
power connector on the back panel of the unit, as illustrated in  
100-240  
VA  
C
~
612  
Figure 6. Connecting the AC Power Connector to Switch  
6. Plug the other end or the power cord into a wall outlet.  
7. Verify that the POWER LED is green. If the LED is OFF, refer to  
Note  
The switch perform a self-diagnostic test upon power up. This takes  
about 20 seconds to complete.  
8. Power ON the end-nodes connected to the switch.  
9. Check that the L/A LEDs are green or blinking green for the ports  
connected to end-nodes. If any of the LEDs are OFF, refer to  
The switch is now ready for use.  
33  
 
 
Chapter 2: Installation  
Installing the Switch on a Wall  
To install the switch on a wall, perform the following procedure:  
1. Remove all the items from the packaging and store the packaging  
material in a safe place. In the event a problem occurs and you need  
to return the unit, please use as much of the original shipping material  
as possible.  
2. Attach the two mounting brackets (provided) to the sides of the switch  
using the eight flathead Phillips screws (provided), as illustrated in  
P
O
W
E R  
2
4
6
8
2 4  
1
P o  
t 1 0 / 1  
0 0 / 1 0 0  
0
r
1
2
1
1
4
3
1
0 B  
6
5
a s  
e - T G i g  
1
8
2
7
2
0
9
a b  
i t  
E t A  
1
1
2
h e  
2
1
3
n e t  
r
T -  
4
G
S
1
w i  
t c h  
5
S
9
1
0
0
7
2
2 /  
4
1
9
2
1
2
3
4
6
8
3
1
0
5
1
2
1
4
1
0
0
0
L
I N  
K
1
6
A C  
T
1
1
0
/ 1  
0
0
L
N
I
K
1
8
3
A C  
T
2
0
5
F
D
X
H
D
X
2
2
C O L  
7
2
4
2
3
1922  
Figure 7. Attaching the brackets to the sides of the switch  
34  
 
   
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
3. Place the switch on the wall. Then mount the switch using the plastic  
anchors and screws which are shipped with the product. See Figure 8.  
Warning  
The switch must be mounted with the AC Power Connector facing  
down to conform with UL requirements as shown in Figure 8.  
P O  
W
E R  
2
4
6
8
2 4  
P
1
0
o
r
t 1 0 / 1 0 0 / 1 0  
1
2
1
1
4
3
0 0 B  
1
6
5
a s  
1
e - T G i g  
8
7
2
0
9
1
a b  
i t  
E
2
2
1
t h e  
A
2
1
3
n e t  
r
T
-
4
G
S
1
w i t c h  
5
S
9
1
0
7
0
2
/ 2  
1
9
4
2
1
2
3
4
6
1
8
1
0
1
5
2
7
1
4
1
0
0
0
L
N
I
9
1
K
1
6
A
C
T
L
1
0
/ 1  
0
0
I N  
K
1
8
1
3
A
C
T
2
0
5
F
D
X
H
D
X
2
2
C O L  
1
7
1
2
4
9
2
2
3
1925  
Figure 8. Attaching the switch to the wall  
4. Connected the twisted pair cables to the twisted pair ports.  
When connecting a twisted pair cable to a port, observe the following  
guidelines:  
ˆ An RJ-45 connector should fit snugly into the port on the switch.  
The tab on the connector should lock the connector into place.  
ˆ Check that you are using the appropriate type of twisted pair  
for twisted pair cable specifications.  
ˆ Since the twisted pair port, when operating in Auto-Negotiation, is  
Auto MDI/MDI-X, you can use either a straight-through or  
35  
 
 
Chapter 2: Installation  
crossover twisted pair cable to connect any type of network device  
to a port on the switch. If you disable Auto-Negotiation on the port,  
the port defaults to MDI-X.  
5. Apply AC power to the switch by plugging the power cord into the AC  
power connector on the back panel of the unit, as illustrated in  
6. Plug the other end or the power cord into a wall outlet.  
7. Verify that the POWER LED is green. If the LED is OFF, refer to  
Note  
The switch perform a self-diagnostic test upon power up. This takes  
about 20 seconds to complete.  
8. Power ON the end-nodes connected to the switch.  
9. Check that all the L/A LEDs are green or blinking green for the ports  
connected to end-nodes. If any of the LEDs are OFF, refer to  
The switch is now ready for use.  
36  
 
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Installing the Switch in a Rack  
Perform the following procedure to install the switch in a standard 19-inch  
rack. If you are not installing the switch in a rack, go to the next procedure.  
1. Place the unit upside down on a level, secure surface.  
2. If they have been previously installed, remove the self-adhesive rubber  
feet from the bottom of the switch, as shown in Figure 9 using a flat-  
head screwdriver.  
Figure 9. Removing the Feet  
3. Turn the switch over.  
4. Attach the two rackmounting brackets (provided) to the sides of the  
switch using the eight flathead Phillips screws (provided), as illustrated  
2
4
Po  
rt  
1
0
/1  
0
0
/1  
A
0
T
E
0
0
B
-GS900/24  
a
se  
-T  
G
ig  
a
b
it  
th  
er  
n
e
t
S
1
w
itc  
h
3
5
7
9
11  
13  
15  
17  
18  
1
19  
20  
21  
22  
23  
24  
3
5
PO  
WER  
1000 LINK  
7
2
4
6
8
AC  
T
9
10/100 LINK  
11  
1
0
12  
14  
AC  
16  
T
13  
FDX  
15  
HDX  
C
O
L
2
17  
19  
6
21  
8
23  
10  
12  
14  
16  
18  
20  
22  
24  
1920  
Figure 10. Attaching Rack Mounting Brackets  
37  
 
     
Chapter 2: Installation  
5. Mount the switch in the 19-inch rack using the #10-32 Phillips screws  
which are shipped with the product, as illustrated in Figure 11.  
2
4
Po  
rt  
1
0
/1  
0
0
/1  
A
0
T
th  
0
0
B
-GS900/24  
a
se  
-T  
G
ig  
a
b
it  
E
er  
n
e
t
S
1
w
itc  
h
3
5
7
9
11  
13  
15  
17  
18  
1
3
19  
20  
21  
22  
23  
24  
5
PO  
WER  
1000 LINK  
7
2
4
6
8
AC  
T
9
10/  
1
100 LINK  
1
0
1
2
1
4
1
AC  
1
T
6
13  
FDX  
15  
HDX  
C
O
L
2
17  
19  
6
21  
8
23  
10  
1
2
4
1
6
18  
20  
22  
24  
1921  
Figure 11. Rack Mounting the Switch  
6. Connected the twisted pair cables to the twisted pair ports.  
When connecting a twisted pair cable to a port, observe the following  
guidelines:  
ˆ An RJ-45 connector should fit snugly into the port on the switch.  
The tab on the connector should lock the connector into place.  
ˆ Check that you are using the appropriate type of twisted pair  
for twisted pair cable specifications.  
ˆ Since the twisted pair port, when operating in Auto-Negotiation, is  
Auto MDI/MDI-X, you can use either a straight-through or  
crossover twisted pair cable to connect any type of network device  
to a port on the switch. If you disable Auto-Negotiation on the port,  
the port defaults to MDI-X.  
7. Apply AC power to the switch by plugging the power cord into the AC  
power connector on the back panel of the unit, as illustrated in  
8. Plug the other end or the power cord into a wall outlet.  
9. Verify that either the POWER LED is green. If the LED is OFF, refer to  
“Troubleshooting” on page 41 for instructions.  
Note  
The switch perform a self-diagnostic test upon power up. This takes  
about 20 seconds to complete.  
38  
 
 
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
10. Power ON the end-nodes connected to the switch.  
11. Check that all the L/A LEDs are green or blinking green for the ports  
connected to end-nodes. If any of the LEDs are OFF, refer to  
“Troubleshooting” on page 41 for instructions.  
The switch is now ready for use.  
39  
 
Chapter 2: Installation  
40  
 
Chapter 3  
Troubleshooting  
This chapter contains information on how to troubleshoot the switch in the  
event that a problem occurs.  
Note  
If you are still unable to resolve the problem after following the  
instructions in this chapter, contact ATI Technical Support for  
Check the POWER LED on the front of the switch. If the LED is OFF,  
indicating that the unit is not receiving power, do the following:  
ˆ Ensure that the power cord is securely connected to the power source  
and to the AC connector on the back panel of the switch.  
ˆ Verify that the power outlet has power by connecting another device  
to it.  
ˆ Connect the unit to another power source.  
ˆ Use a different power cord.  
ˆ Verify that the voltage from the power source is within the required  
levels for your region.  
Verify that the L/A LEDs are green or blinking green for each port is ON. If  
a L/A LED is OFF, do the following:  
ˆ Verify that the end-node connected to the port is powered ON and is  
operating properly.  
ˆ Verify that the twisted pair cable is securely connected to the port on  
the switch and to the port on the end-node.  
ˆ Ensure that the twisted pair cable does not exceed 100 meters (328  
feet).  
ˆ Verify that you are using the appropriate category of twisted pair cable:  
Category 3 or better for 10 Mbps operation and Category 5 and  
Category 5E for 100 and 1000 Mbps operation.  
ˆ Verify that the eco friendly switch is in the “Out” position.  
Note  
A 1000Base connection can take from five to ten seconds for the link  
to be established.  
41  
 
     
Appendix A  
Technical Specifications  
Physical Specifications  
Dimensions:  
(W x D x H)  
AT-GS900/16  
12.1 cm x 18.4 cm x 4.4 cm  
(4.7 in x 7.2 in x 1.7 in)  
AT-GS900/24  
28 cm x 18 cm x 4.4 cm  
(11.0 in x 7.1 in x 1.7 in)  
Weight:  
AT-GS900/16  
AT-GS900/24  
0.954kg (2.1 lbs)  
1.794 kg (3.95lbs)  
Environmental Specifications  
Operating Temperature:  
Storage Temperature:  
Operating Humidity:  
0° C to 40° C (32° F to 104° F)  
-25° C to 70° C (-13° F to 158° F)  
5% to 90% non-condensing  
5% to 95% non-condensing  
Up to 10,000 feet (3,048 meters)  
Storage Humidity:  
Operating Altitude Range:  
Power Specifications  
Power Consumption:  
AT-GS900/16  
9.9 watts maximum  
15.9 watts maximum  
AT-GS900/24  
AC Input Electrical Ratings:  
AT-GS900/16  
100 - 240 V AC, 0.5 A  
100 - 240 V AC, 1.1 A  
AT-GS900/24  
Frequency:  
50/60 Hz  
42  
 
           
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
Safety and Electromagnetic Emissions Certifications  
EMI  
FCC Part 15 Class A  
CISPR 22 Class A,  
EN55022 Class A: 2006 + A1:2007 version  
Immunity  
Safety  
EN55024  
UL - USA (UL60950-1)  
LVD (EN60950-1, 2nd edition)  
CSA or CUL - Canada  
C-Tick - Australia  
CD Mark  
Environment  
Compliance  
Eu-RoHS compliant  
WEEE  
China RoHS compliant  
Quality and Reliability:  
AT-GS900/16 MTBF: >50,000 hours @ 25 C  
AT-GS900/24 MTBF: >50,000 hours @ 25 C  
Compliance Standards  
IEEE 802.3 – 10Base-T  
IEEE 802.3u – 100Base-TX  
IEEE 802.3ab – 1000Base-TX Gigabit Ethernet  
IEEE 802.3x – Flow Control, Symmetric and Asymmetric  
43  
 
   
Chapter : Technical Specifications  
RJ-45 Twisted Pair Port Connectors  
This section lists the connectors and connector pinouts for the  
AT-GS900/16 and AT-GS900/24 Fanless Gigabit Ethernet Switches and  
their components.  
Figure 12 illustrates the pin layout to an RJ-45 connector and port.  
8
8
1
1
Figure 12. RJ-45 Connector and Port Pin Layout  
Table 5 lists the RJ-45 pin signals when a twisted pair port is operating in  
the MDI configuration.  
Table 5. MDI Pin Signals (10Base-T or 100Base-TX)  
Pin  
Signal  
1
2
3
6
TX+  
TX-  
RX+  
RX-  
Table 6 lists the RJ-45 port pin signals when a twisted pair port is  
operating in the MDI-X configuration.  
Table 6. MDI-X Pin Signals (10Base-T or 100Base-TX)  
Pin  
Signal  
1
2
3
6
RX+  
RX-  
TX+  
TX-  
Table 7 lists the RJ-45 connector pins and their signals when a  
44  
 
         
AT-GS900/16, AT-GS900/24 Gigabit eco-friendly Ethernet Switch Installation Guide  
1000Base-T port is operating at 1000 Mbps.  
Table 7. RJ-45 1000Base-T Connector Pinoutsa  
Pin  
Pair  
Signal  
TX and RX+  
1
2
3
4
5
6
7
8
1
1
2
3
3
2
4
4
TX and RX-  
TX and RX+  
TX and RX+  
TX and RX-  
TX and RX-  
TX and RX+  
TX and RX-  
a. Bi-directional data on each pair.  
45  
 
 

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