Allied Telesis Switch AT FH812U User Manual

AT-FH812u  
AT-FH824u  
AT-FH812u-SW  
AT-FH824u-SW  
Fast Ethernet 10/100 Hubs  
Version 2  
Installation Guide  
PN 613-10753-00 Rev G  
 
Agency Compliance  
EMI Certification  
FCC Class A (USA)  
Warning: This equipment generates, uses, and can radiate radio  
frequency energy and, if not installed and used in accordance with the  
instruction manual, may cause interference to radio communications. It  
has been tested and found to comply with the limits for a Class A digital  
device pursuant to Subpart B of Part 15 of FCC Rules, which are designed  
to provide reasonable protection against such interference when operated  
in a commercial environment. Operation of this equipment in a  
residential area is likely to cause interference, in which case the user, at  
his own expense, will be required to take whatever measures are required  
to correct the interference.  
You may use shielded (STP) or unshielded twisted-pair (UTP) for RJ-45  
connections - Category 3 or greater for 10 Mbps connections, and Category  
5 for 100 Mbps connections.  
Industry Canada  
Class A  
This Class A digital apparatus meets all requirements of the Canadian  
Interference-Causing Equipment Regulations.  
Cet appareil numérique de la classe A respecte toutes les exigences du  
Règlement sur le matériel brouilleur du Canada.  
European EMC  
Compliance  
CE Mark Declaration of Conformance for EMI and Safety (EEC)  
This is to certify that this product complies with ISO/IEC Guide 22 and  
EN45014.  
iii  
 
 
Agency Compliance  
It conforms to the following specifications:  
! Emissions: EN55022 (1988)/CISPR-22 (1985) class A  
! Immunity: EN50082-1  
! EN60555-2 (1995) class A  
! EN60555-3  
Warning  
Do not plug a phone jack connector in the RJ-45 port. This may damage  
this device.  
Safety Compliance  
Warning  
Before making connections, make sure you have the correct Cord Set.  
Check it (read the label on the cable) against the following specification  
list.  
Voltage  
120 Volts  
Cord Set Specifications  
UL Listed/CSA Certified Cord Set  
Minimum 18 AWG; type SVT or SJT three conductor cord  
Maximum length of 15 feet  
Parallel blade, grounding type attachment plug rated 15A, 125V  
UL Listed/CSA Certified Cord Set  
240 Volts  
(North America)  
Minimum 18 AWG; type SVT or SJT three conductor cord  
Maximum length of 15 feet  
230 Volts  
(Europe only)  
Cord Set with H05VV-F cord having three conductors with  
mimumum diameter of 0.75 mm2  
IEC-320 receptacle; male plug rated 10A, 250V  
iv  
 
Table of Contents  
Agency Compliance ......................................................................................................................................................iii  
Welcome to Allied Telesyn .........................................................................................................................................vii  
Introduction .................................................................................................................................................................... 1  
Installation ...................................................................................................................................................................... 3  
v
 
Table of Contents  
Troubleshooting ........................................................................................................................................................... 15  
Technical Specifications ............................................................................................................................................ 19  
Product Specifications................................................................................................................................ ...................... 19  
Technical Support Fax Order ...................................................................................................................................23  
AT-FH800 Series Installation Guide Feedback .................................................................................................... 25  
vi  
 
Welcome to Allied Telesyn  
This guide contains instructions on how to install and configure a AT-FH800 Series  
Fast Ethernet Hub.  
Where to Find Web-based Guides  
The Allied Telesyn web site at www.alliedtelesyn.com provides you with an easy  
way to access the most recent documentation and technical information for all of our  
products. For product guides, you can go directly to the following web page:  
Document Conventions  
Through out this guide, you will notice several conventions that you should become  
familiar with first before installing the product.  
Note  
A note provides additional information.  
Caution  
A caution indicates that performing or omitting a specific action may result in  
equipment damage or loss of data.  
Warning  
A warning indicates that performing or omitting a specific action may result in  
bodily injury.  
vii  
 
     
Welcome to Allied Telesyn  
Contacting Allied Telesyn Technical Support  
There are several ways to contact Allied Telesyn technical support: online, telephone,  
fax or e-mail.  
Online Support  
You can request technical support online by filling out the Online Technical Support  
Telephone and Fax  
Support  
For Technical Support via fax, please fill out the “Technical Support Fax Order” on  
page 23 and send it to the appropriate location listed below.  
Americas  
Germany  
Germany, Switzerland, Austria, Eastern  
Europe  
Tel: (+49) 0130/83-56-66  
Fax: (+49) 30-435-900-115  
United States, Canada, Mexico,  
Central America, South America  
Tel: 1 (800) 428-4835, option 4  
Fax: 1 (503) 639-3176  
Asia  
Italy  
Singapore, Taiwan, Thailand, Malaysia,  
Indonesia, Korea, Philippines, China,  
India, Hong Kong  
Italy, Spain, Portugal, Greece, Turkey,  
Israel  
Tel: (+39) 02-416047  
Tel: (+65) 381-5612  
Fax: (+39) 02-419282  
Fax: (+65) 383-3830  
Australia  
Tel: 1 (800) 000-880  
Japan  
Tel: (+81) 3-3443-5640  
Fax: (+61) 2-9438-4966  
Fax: (+81) 3-3443-2443  
France  
United Kingdom  
United Kingdom, Denmark, Norway,  
Sweden, Finland  
Tel: (+0044) 1235-442500  
Fax: (+44) 1-235-442680  
France, Belgium, Luxembourg,  
The Netherlands, Middle East, Africa  
Tel: (+33) 0-1-60-92-15-25  
Fax: (+33) 0-1-69-28-37-49  
E-mail Support  
United States and Canada  
Latin America, Mexico, Puerto Rico, Caribbean, and Virgin Islands  
United Kingdom, Sweden, Norway, Denmark, and Finland  
viii  
 
         
AT-FH800 Series Installation Guide  
Returning  
Products  
Products for return or repair must first be assigned a Return Materials Authorization  
(RMA) number. A product sent to Allied Telesyn without a RMA number will be  
returned to the sender at the sender’s expense.  
To obtain an RMA number contact Allied Telesyn’s Technical Support at one of the  
following locations:  
North America  
2205 Ringwood Ave  
San Jose, CA 95131  
Tel: 1-800-428-4835, option 4  
Fax: 1-503-639-3716  
European Customer Support Centre  
10/11 Bridgemead Close  
Westmead Industrial Estate  
Swindon, Wiltshire SN5 7YT  
England  
Tel: +44-1793-501401  
Fax: +44-1793-431099  
Latin America, the Caribbean,  
Virgin Islands  
Tel: international code + 425-481-3852  
Fax: international code + 425-483-9458  
Mexico and Puerto Rico  
Tel: 1-800-424-5012, ext 3852 or  
1-800-424-4284, ext 3852  
Mexico only: 95-800-424-5012, ext 3852  
Fax: international code + 425-489-9191  
FTP Server  
If you know the name of a specific driver that you need for an Allied Telesyn device,  
you can download the software by connecting directly to our FTP server at:  
At login, enter ‘anonymous’. Enter your e-mail address for the password as requested  
by the server at login.  
For Sales or  
Corporate  
Information  
Allied Telesyn International, Corp.  
19800 North Creek Parkway, Suite 200  
Bothell, WA 98011  
Allied Telesyn International, Corp.  
960 Stewart Drive, Suite B  
Sunnyvale, CA 94085  
Tel: 1 (425) 487-8880  
Tel: 1 (800) 424-4284 (USA and Canada)  
Fax: 1 (425) 489-9191  
Fax: 1 (408) 736-0100  
Tell Us What You  
Think  
If you have any comments or suggestions on how we might improve this or other Allied  
Telesyn documents, you can fill out the “AT-FH800 Series Installation Guide  
Feedback” on page 25 and return the form to us at the address or fax number provide.  
You can provide feedback online by filling out the Send Us Feedback Form at  
ix  
 
       
 
Chapter 1  
Introduction  
The AT-FH800 Series Fast Ethernet Hubs include the following models:  
! AT-FH812u  
! AT-FH824u  
! AT-FH812u-SW  
! AT-FH824u-SW  
The AT-FH812u (shown in Figure 1) and AT-FH824u are manageable and  
stackable Ethernet hubs with 12 or 24 dual-speed (RJ-45) ports. One slot is used  
for an Optional Agent Module, and another slot for an Optional Switch Module.  
The 12 and 24 port AT-FH812u-SW and AT-FH824u-SW are base unit with  
optional switch modules installed. The AT-FH800-SW models are available in  
North America only.  
These dual-speed hubs provide the easiest method to upgrade your network to fast  
Ethernet. It is not necessary to replace your existing network infrastructure. Just  
add an Allied Telesyn dual-speed hub to your network and attach any 10 or 100  
Mbps device to any port on the hubs. These hubs provide both the standard 10  
Mbps bandwidth needed for common file transfers, and a larger channel with 100  
Mbps of bandwidth that is essential for relieving serious network congestion,  
running multimedia applications, or satisfying power users.  
Figure 1 AT-FH812u Hub Front and Rear Panels  
1
 
     
Introduction  
These dual-speed hubs include a wide range of configuration options. They can be  
stacked together (up to 6 high) to form a dual-speed network of up to 72/144 ports.  
With a Class II rating, they can also be easily cascaded to additional 10 or 100  
Mbps hubs. When the switch module is installed, it links the hub's internal 10  
Mbps and 100 Mbps repeater buses together to form a segmented network,  
allowing traffic to pass between the segments when required.  
Moreover, the optional Agent Module provides the broadest range of management  
options possible. It provides support for SNMP and the following RMON groups:  
statistic, history, alarm and event. Web management, and remote access via an in-  
band, Telnet or SLIP connection.  
These hubs consist of 12/24 RJ-45 dual-speed (10/100 Mbps) ports, and two slots on  
the front panel for optional slide-in modules, including switch modules for internal  
segment interconnection or external media expansion (using cable or fiber optics),  
and an Agent Module.  
2
 
Chapter 2  
Installation  
Verifying Package  
Contents  
Make sure your package contains the following items.  
! One AT-FH800 Series Fast Ethernet Hub  
! Four rubber foot pads  
! Stack cable  
! Rack mount bracket kit  
! AC power cord  
! This installation guide  
! Warranty card  
Pre-Installation  
Requirements  
Prior to installing your hub, make sure you observe the following cabling and  
installation environment requirements. The hub can be placed directly on your  
desktop or mounted in a rack.  
! Do not plug a phone jack connector into any RJ-45 port. This may damage  
the hub. Use only twisted-pair cables with RJ-45 connectors that conform  
with FCC standards.  
! Make sure each twisted-pair cable does not exceed 100 meters (328 feet).  
! Allied Telesyn recommends using Category 5 cable for all network  
connections to avoid any confusion or inconvenience in the future when  
you upgrade attached devices to Fast Ethernet.  
! Power requirements: 100 to 240 VAC ± 10% at 50 to 60 Hz ± 3Hz. The  
hub's power supply automatically adjusts to the input voltage level.  
! The hub should be located in a cool, dry place, with at least 10 centimeters  
(4 inches) of space at the front and back for ventilation.  
! Place the hub out of direct sunlight, and away from heat sources or areas  
with a high amount of electromagnetic interference.  
! If you intend to mount the hub in a rack, make sure you have all the  
necessary mounting screws, brackets, bolts and nuts, and the right tools.  
! Check if network cables and connectors needed for installation are  
available.  
3
 
       
Installation  
Stacking Hubs on  
The hub can be stacked on a secure table or desktop.  
a Flat Surface  
1. Attach the self-adhesive rubber foot pads (that come with this package) on each  
of the 4 concave spaces located on the bottom of the first hub.  
2. Place the first hub on a firm flat surface where you want to install the stack.  
3. Repeat Step 1 for each hub before stacking them. The rubber foot pads cushion  
the hub against shock/vibrations and provide space between each hub for  
ventilation.  
Rack-Mounting the  
Hubs  
Please comply with the following instructions to ensure that your hub is securely  
mounted in the rack, as shown in Figure 2.  
Figure 2 Rack-Mounting Hubs  
1. Use a standard EIA 19-inch rack.  
2. Use the brackets and screws supplied in the rack mounting kit.  
3. Use a cross-head screwdriver to attach the brackets to the side of the hub.  
4. Position the hub in the rack by lining up the holes in the brackets with the  
appropriate holes on the rack, and then use the supplied screws to mount the  
hub in the rack.  
Connecting the  
Hub System  
The hub has 12/24 RJ-45 ports, one of which also serves as a dual-speed (MDI/  
MDI-X) daisy-chain port. All the repeater ports support 10 or 100 Mbps  
half-duplex connections.  
4
 
       
AT-FH800 Series Installation Guide  
Making a  
Connection via an  
MDI-X Station Port  
You can connect any RJ-45 (MDI-X) station port on the hub to any device that uses  
a standard network interface such as a PC or server, or to a network  
interconnection device such as a bridge or router (depending on the port type  
implemented).  
1. Prepare the network devices you wish to network. Make sure you have  
installed 10Base-T or 100Base-TX network interface cards for  
connecting to the hub's RJ-45 (MDI-X) station ports. You also need to  
prepare straight-through shielded or unshielded twisted-pair cables  
with RJ-45 connector at both ends. Use 100 Ohm Category 3, 4 or 5  
cable for standard 10 Mbps Ethernet connections, or 100 Ohm  
Category 5 cable for 100 Mbps Fast Ethernet connections.  
2. Connect one end of the cable to the RJ-45 port of the network interface card,  
and the other end to any available (MDI-X) station port on the hub. When  
inserting an RJ-45 plug, be sure the tab on the plug clicks into position to  
ensure that it is properly seated. Using the hub in a stand-alone configuration,  
you can network up to 12/24 end nodes.  
Connecting to the  
Stack's Backplane  
As shown in Figure 3:  
1. Plug one end of the stack cable (provided with the package) in the “Out” port of  
the top hub and the other end to the “IN” port of the next hub.  
2. Repeat this step for each hub in the stack. Form a simple chain starting at the  
Out port on the first hub and ending at the IN port on the last hub (stacking up  
to 6 hubs).  
Note  
All the hubs must be powered ON to allow traffic to pass through the stack.  
Figure 3 Connecting to the Backplane  
5
 
       
Installation  
Making a  
1. To make a direct connection to a compatible hub or switch, use the MDI daisy-  
chain port (Port 12/24). When connecting to this port, remember to set the port  
selection switch to MDI. You can also connect any RJ-45 (MDI-X) port on the  
hub to an MDI daisy-chain port on the other device.  
Connection via the  
MDI Daisy-Chain  
Port  
2. Prepare straight-through shielded or unshielded twisted-pair cables with RJ-  
45 plugs at both ends. Use 100 Ohm Category 3, 4 or 5 cable for standard 10  
Mbps Ethernet connections, or 100 Ohm Category 5 cable for 100 Mbps Fast  
Ethernet connections. When inserting an RJ-45 plug, be sure the tab on the  
plug clicks into position to ensure that it is properly seated.  
Note  
To connect to another hub or switch, you may also attach to (MDI-X) station ports  
at both ends if you use crossover cabling. For additional information, see “Cabling  
3. When connecting to another hub running at 10 Mbps, you can cascade up to 4  
hubs, and use up to 100 meters (328 feet) for each inter-hub link. However, if  
you cascade to another hub running at 100 Mbps (such as two dual-speed  
hubs), you can only cascade two hubs, and the inter-hub cabling must be  
limited to 5 meters (16 feet). Configuration examples of dual-speed hubs with  
switch for both the10Base-T (Figure 4) and 100Base-TX (Figure 5) cascade rule  
each include two workable cascade configurations and one example of a  
configuration that will not work (does not cascade correctly).  
4. The only way to extend the inter-hub cabling when operating at 100 Mbps is to  
reduce the length of cable used to connect the PCs to the hubs. To achieve a  
larger network diameter, you should use a switch to connect several hubs (or  
stacks) together. Because a switch breaks up the path for connected devices  
into separate collision domains, it has no restrictions on cascade length.  
6
 
 
AT-FH800 Series Installation Guide  
10Base-T Cascade Rule  
A maximum of four hubs/repeaters can be cascaded  
within the same 10Base-T collision domain  
Figure 4 10Base-T Cascade Configuration  
7
 
 
Installation  
10Base-T Cascade Rule  
A maximum of four hubs/repeaters can be cascaded  
within the same 10Base-T collision domain  
Figure 5 100Base-TX Cascade Configuration  
8
 
 
AT-FH800 Series Installation Guide  
Using an Optional  
Module  
The upper slot on the front of the hub is provided for installing anyone of the 3  
different Switch Modules or Media Expansion Modules (also referred to as an  
uplink module). The Switch Module is used to bridge the internal 10 and 100 Mbps  
repeater buses, the twisted-pair and fiber optic uplink modules are used to link the  
stack to other segments or to a remote site.  
Note  
The Media Expansion Modules confine local traffic to the stack, passing traffic to  
the attached device only when required.  
The lower slot on the front panel is used for installing an Agent Module, which  
provides management access to the hub or the connected stack using a direct  
console or modem connection via Telnet, a web browser, or SNMP/RMON  
management software.  
Installing an  
Optional Module  
To install an optional module, do the following:  
1. Disconnect power to the hub.  
2. Remove the face plate (or a previously installed module) from the appropriate  
slot by removing the two screws with a cross-head screwdriver. A Switch  
Module or uplink module can be installed in the upper slot on the front of the  
hub, and the Agent Module can be installed in the lower slot on the front of the  
hub.  
3. Before opening the package that contains the uplink module, touch the bag to  
the hub casing to discharge any potential static electricity.  
4. Remove the module from the anti-static shielded bag.  
5. Holding the module level, gently push it all the way into the expansion slot,  
ensuring that it firmly engages with the connector.  
6. If you are sure the module is properly mated with the connector, replace the  
retainer screws to secure the module in the expansion slot.  
7. Run corresponding media type between the uplink module and the target  
device.  
Note  
Uplink modules are not hot-swappable. Be sure you power OFF the switch before  
installing any of these modules.  
9
 
   
Installation  
Using the Agent  
To manage the hub (or stack), you must install an optional Agent Module,  
AT-FH805u, in the lower slot on the front of the hub (See Figure 6). Once you have  
installed the module, you will be able to manage the system via a direct connection  
to the serial port on the front of the module (using a console or modem connection).  
The management agent provided with this module can also be accessed over the  
network using Telnet for a text-based interface, with a web browser for a graphic  
interface, or using network management software based on SNMP/RMON  
protocols from a management station anywhere in the network. See the  
AT-FH812u and AT-FH824u User’s Guide for further information.This guide can  
be downloaded from Allied Telesyn’s website at www.alliedtelesyn.com/  
support/prd_libs.htm.  
Module  
(AT-FH805u)  
Note  
The Agent Module is not hot-swappable. Be sure you power OFF the hub before  
installing any of these modules.  
Note  
Do not install more than one Agent Module in a stack.  
Figure 6 Agent Module Front Panel  
Using the Switch  
Module  
The 10 and 100 Mbps repeater buses in the hub can be linked together by  
installing an optional switch module (AT-FH806u) in the upper slot on the front  
panel (See Figure 7). The switch module is used when traffic must be passed to a  
destination in the other segment, when broadcast traffic is sent, or when the  
destination is unknown.  
(AT-FH806u)  
Note  
AT-FH812u-SW and AT-FH824u-SW have the switching module already  
installed.  
Note  
Multiple switch modules may be installed in a stack, but only one of the modules  
will actively bridge the 10 and 100 Mbps repeater buses. The other modules will  
be placed in standby mode, and will only be enabled if the primary switch module  
should fail or is powered OFF.  
Figure 7 Switch Module Front Panel  
10  
 
       
AT-FH800 Series Installation Guide  
Using the  
100Base-FX  
Module  
You can connect to a remote site using the fiber optic uplink module AT-FH807u.  
These modules act as a two-port switch, interfacing the internal repeater buses to  
the attached device. SC fiber module is available. It connects to both the internal  
10 and 100 Mbps repeater bus, but operates only at 100 Mbps for the external  
connection. The default setting of this module is auto-negotiate (see Figure 8).  
(AT-FH807u)  
Figure 8 100Base-FX Module Front Panel  
Before using a fiber optic module, prepare fiber optic cable connectors at both ends.  
When connecting the module directly to an end-node device, for example a  
workstation or file server, run cable from the RX (TX) port on the module to the TX  
(RX) port on the target device. When inserting the cable, be sure the tab on the  
plug clicks into position to ensure that it is properly seated. Note that as a general  
rule, the length of fiber optic cable should not exceed 2 kilometers (1.24 miles)  
when the link is operated at full-duplex or 412 meters (0.25 miles) for half-duplex.  
Note  
In the present design, the uplink port only can not be monitored or managed by  
Local Management Agent, Telnet Agent, RMON Agent, SNMP Agent, or Web-  
based Management.  
Using the  
100Base-TX  
Module  
You can use a twisted-pair module to connect the stack to a network device in  
another segment such as another hub, a switch, or a workgroup server. This  
module acts as a two-port switch, interfacing the internal repeater buses to the  
attached device. It supports 10 Mbps or 100 Mbps with half- or full-duplex  
communications via auto-negotiation (if also supported by the attached device).  
This module confines local traffic to the stack and passes traffic to the attached  
device only when required.  
(AT-FH808u)  
Figure 9 100Base-TX Module Front Panel  
11  
 
     
Installation  
Before using the 100Base-TX module, prepare Category 5 straight-through  
twisted-pair cable with RJ-45 plugs at both ends. When connecting the module  
directly to an end-node device (e.g., a workstation or file server), a bridge or router,  
run cable from the MDI-X port on the uplink module to the target device. However,  
when connecting the module to a compatible hub or switch, connect one end of the  
cable to the MDI port on the uplink module, and the other end to an MDI-X port on  
the target device (or vice versa). When inserting an RJ-45 plug, be sure the tab on  
the plug clicks into position to ensure that it is properly seated. Note that as a  
general rule, the length of any twisted-pair cable should not exceed 100 meters  
(328 feet).  
Note  
In the present design, the uplink port only can not be monitored or managed by  
Local Management Agent, Telnet Agent, RMON Agent, SNMP Agent, or Web-  
based Management.  
Powering ON the  
Hub  
1. Plug the power cord into the power socket at the rear of the hub, and the other  
end into a power outlet.  
2. Check the LED marked Power ON the front panel to see if it is ON. The unit  
will automatically select the setting that matches the connected input voltage.  
Therefore, no additional adjustments are necessary when connecting it to any  
input voltage within the range marked on the rear panel.  
3. The hub performs a self-diagnostic test upon power-on. (Note that this test  
takes about 10 seconds to complete.)  
4. However, remember that the optional slide-in modules are not hot-swappable.  
Be sure the hub is powered OFF when installing or removing these modules.  
5. A socket is provided on the back of the hub for a redundant power unit (RPU)  
which will supply power to the hub in the event that its internal power supply  
should fail. Refer to the manual provided with the RPU for further details.  
12  
 
 
AT-FH800 Series Installation Guide  
Verifying Port  
Status  
Figure 10 depicts Port LEDs. Check each connection by comparing the port status  
LEDs with Table 1.  
Figure 10 Port LEDs  
Table 1 lists and defines the hub’s LEDs.  
Table 1 LEDs  
LED  
State  
Indication  
Power  
Switch  
ON  
Hub is receiving power  
OFF  
Switch Module is active  
Flashing  
Switch Module is not installed or is in slave mode  
Segment LEDs (10 Mbps/100 Mbps)  
Activity  
Flashing  
Flashing  
Traffic exists on the segment  
Collision  
Two or more devices attempted to transmit data at  
the same time (Normal situation under ethernet  
CSMA/CD)  
Ports LEDs (1-12/24) Yellow = 10 Mbps, Green = 100 Mbps  
Link/Partition  
ON  
Port has established a valid network connection  
Port partitioned due to abnormal network condition  
Flashing  
Media Module LEDs  
Full/Half  
ON  
Port is set to full-duplex  
Collision  
Flashing  
Two or more devices attempted to transmit data at  
the same time (Normal situation under ethernet  
CSMA/CD)  
Activity  
Flashing  
ON  
Port is passing traffic; blinking proportional to traffic  
A valid link has been established on this port  
Port is operating at 100 Mbps  
Link  
100M  
ON  
Agent Module LEDs  
Active  
ON  
Agent Module is active  
Flashing  
Agent Module is running power-on self-test  
13  
 
     
Installation  
Verifying System  
Operation  
Verify that all attached devices have a valid connection. The hub monitors the link  
status for each port. If any device is properly connected to the hub and  
transmitting a link beat signal, the Link LED will light up for the corresponding  
port. If the Link LED fails to light when you connect a device to the hub, check the  
following items:  
! Be sure all network cables and connectors are properly attached to the  
connected device and the hub.  
! See if your cable is functioning properly by using it for another port and  
attached device that displays valid indications when connected to the  
network.  
! Verify that you have not exceeded the specified limits for cable length. No  
twisted-pair cable should exceed 100 meters (328 feet). When attaching a  
100 Mbps hub to the repeater ports, only one hub can be cascaded and the  
maximum length of inter-hub cabling is 5 meters (16 feet). Also note that  
when using fiber optics, you can run a cable up to two kilometers (1.24  
miles) when using full-duplex, or up to 412 meters (0.25 miles) with half-  
duplex.  
! When using an optional uplink module, both sides of the connection must  
use the same transmission mode (half- or full-duplex). If any device is  
connected to the 100Base-FX module, then you must manually set the  
transmission mode using the toggle switch or the configuration options  
provided by the Agent Module.  
14  
 
 
Chapter 3  
Troubleshooting  
Diagnosing Hub  
LEDs  
The hub can be easily monitored through panel LEDs to assist the network  
manager in identifying problems. This section describes common problems you  
may encounter and possible solutions.  
Symptom. 10/100M Link LED does not light up after making a connection.  
Cause. Network interface, for example a network adapter card on the attached  
device, network cable, or hub port is defective.  
Solution. Verify that the hub and attached device are powered on. Be sure the  
cable is plugged into both the hub and corresponding device. Verify that the proper  
cable type is used and its length does not exceed specified limits (100 meters/328  
feet when connecting to a workstation or switch, and 5 meters/16 feet when  
connecting to another hub). Check the network adapter on the attached device and  
cable connections for possible defects. Replace the defective adapter or cable if  
necessary.  
Symptom. Power LED is not green after power-ON.  
Cause. Defective power outlet, power cord, or internal power supply.  
Solution. Check the power outlet by plugging in another device that is functioning  
properly. Check the power cord with another device. If these measures fail to  
resolve the problem, have the unit's power supply replaced by a qualified Allied  
Telesyn distributor.  
Power and Cooling  
Problems  
If the Power LED is not lite when the power is applied, you may have a problem  
with the power outlet, power cord, or internal power supply as explained in the  
previous section. However, if the unit powers OFF after running for a while, check  
for loose power connections, power losses or surges at the power outlet, and verify  
that the fan on back of the unit is unobstructed and running prior to shutdown. If  
you still cannot isolate the problem, then the internal power supply may be  
defective. In this case, contact your Allied Telesyn distributor for assistance.  
Installation  
Verification  
Verify that all system components have been properly installed. If one or more  
components appear to be malfunctioning, for example the power cord or network  
cabling, test them in an alternate environment where you are sure that all the  
other components are functioning properly.  
15  
 
         
Troubleshooting  
Cabling  
Verification  
1. Verify that the cabling type is correct. Be sure all cable connectors are securely  
seated in the required ports. Use 100 Ohm Category 5 straight-through cable  
for all standard twisted-pair connections.  
2. Make sure all devices are connected to the network. Equipment may have been  
unintentionally disconnected from the network.  
3. This is a Class II hub and can only be cascaded from a repeater port to one other  
hub using 5 meters (16 feet) of cabling if the link is operating at 100 Mbps. If  
you must connect to more than one hub, use an optional Media Expansion  
Module or a switch.  
4. If you want to connect to another hub or a switch, use an RJ-45 MDI to MDI-X  
connection. If you must cascade to a hub or switch using MDI-X ports at both  
ends of the cable (not the MDI port), make sure a crossover cable is used (see  
should only be used if an MDI daisy-chain port is not available.  
Network Adapter  
Verification  
Make sure the network interface hardware and software drivers for the attached  
devices are functioning properly. Check the adapter cards and associated drivers  
used in any attached workstation or server.  
RJ-45 Port and  
Cable  
RJ-45 (MDI-X) station ports (see Figure 11) can be attached to any devices which  
use a standard network interface (for example, a workstation, server, bridge or  
router). The RJ-45 (MDI) daisy-chain ports can be cascaded to a station port on  
similar networking devices (for example, another hub or switch). Use UTP or STP  
cable for RJ-45 connections: 100 Ohm Category 3, 4 or 5 cable for 10 Mbps  
connections or 100 Ohm Category 5 cable for 100 Mbps connections. Also be sure  
that the length of any twisted-pair connection does not exceed 100 meters (328  
feet), and that the length of any cascaded connection from a repeater port to  
another hub does not exceed 5 meters (16 feet) if the link is operating at 100 Mbps.  
Assignments  
Figure 11 RJ-45 Connector  
16  
 
         
AT-FH800 Series Installation Guide  
Port assignments per pin are defined in Table 2, below. Schematics for both  
straight and crossover twisted-pair cable are shown in Figure 12 and Figure 13.  
Table 2 Port Assignments Per Pin  
Assignment  
(Station ports 1-12/24 MDI-X)  
Assignment  
(Port 12 or 24 MDI)  
Pin  
1
2
3
6
Input Receive Data +  
Input Receive Data -  
Output Transmit Data +  
Output Transmit Data -  
Not Used  
Output Transmit Data +  
Output Transmit Data -  
Input Receive Data +  
Input Receive Data -  
Not Used  
4, 5, 7, 8  
RJ45 PIN  
RJ45 PIN  
1
1
2
TD +  
TD +  
2
TD -  
TD -  
3
3
4
5
6
7
8
RD +  
RD +  
4
5
6
7
8
Not Used  
Not Used  
Not Used  
Not Used  
RD -  
RD -  
Not Used  
Not Used  
Not Used  
Not Used  
er IEEE 802.3 specifications  
Figure 12 Schematics for Straight-Through Cable  
RJ45 PIN  
RJ45 PIN  
1
2
1
2
3
TD +  
TD +  
TD -  
TD -  
3
4
RD +  
RD +  
4
5
6
7
8
Not Used  
Not Used  
Not Used  
Not Used  
5
6
7
8
RD -  
RD -  
Not Used  
Not Used  
Not Used  
Not Used  
Per IEEE 802.3 specifications  
Figure 13 Schematics for Crossover Cable  
17  
 
     
 
Appendix A  
Technical Specifications  
Base Unit  
Access Method  
CSMA/CD, 10 Mbps or 100 Mbps  
Standards  
IEEE 802.3 10Base-T, IEEE 802.3u 100Base-TX  
Conformance  
Communication Rate  
Media Supported  
10 Mbps or 100 Mbps  
10Base-T 100 Ohm Category 3,4,5 UTP/STP, 100Base-TX 100  
Ohm Category 5 UTP/STP  
Number of Ports  
Stackable Expansion  
Indicator Panel  
12/24 dual-speed ports  
Up to 6 modules with stack cable  
LEDs for monitoring power, switch module, segment activity/  
collision, port link/partition  
Dimensions  
Weight  
440 x 200 x 63 millimeters (17.6 x 8.0 x 2.52 inches)  
4.5 kilograms (9.92 pounds)  
Input Power  
Full range power input: 100 to 240VAC 10%, 50 to 60 Hz  
3Hz, 1.5A  
Power Consumption  
Heat Dissipation  
50 Watts  
170.5 BTU/hr  
Standard Operating  
Temperature  
0°C to 40°C (32 to 104°C)  
Humidity  
Certification  
Emissions  
Immunity  
Safety  
5% to 95% (Non-condensing)  
CE Mark  
FCC Class A, VCCI Class A, CISPR Class A, EN55022 Class A  
EN50082-1  
CSA/NRTL, TUV/GS  
19  
 
     
Technical Specifications  
1
Network Criteria  
Hub-to-Workstation  
Distance  
100 meters maximum using twisted-pair cable  
10 Mbps link: 100 meters using twisted-pair cable  
Inter-hub Distance  
100 Mbps link: 5 meters using twisted-pair cable (assumes  
100 meters from each node to the hub)  
Total Network Span  
Single Hub  
Two-hub Chain1  
200 meters of twisted-pair cable  
(100 meters to each attached node)  
205 meters of twisted-pair cable  
(100 meters to each attached node, and 5 meters between  
hubs)  
1. When cascading a dual-speed hub to another dual-speed hub or to a 100 Mbps hub, the cascade is  
limited to two hubs, and the interhub cabling is limited to 5 meters. However, up to three 10 Mbps  
hubs can be cascaded off of a dual-speed hub using 100 meters of cable for each link.  
AT-FH805u Agent  
Module  
System  
Configuration  
On-board configuration via console or modem connection to  
serial port or via Telnet, Web-based management via HTTP  
protocol to access embedded management program.  
Management Agent SNMP support, MIB II (RFC1213), Multi-segment Repeater MIB  
(RFC 2108), Ethernet-like MIB (RFC1643), RMON MIB  
(RFC1757), and Allied Telesyn's private MIB.  
RMON  
Groups 1-3, 9 (Statistics, History, Alarm, Event).  
Assignment  
(Station ports 1-24)  
Assignment  
(Daisy Chain Port)  
Pin  
1
Input Receive Data +  
Output Transmit Data +  
Output Transmit Data -  
Input Receive Data +  
Input Receive Data -  
Not Used  
2
Input Receive Data -  
Output Transmit Data +  
Output Transmit Data -  
Not Used  
3
6
4, 5, 7, 8  
1.  
5 meters = 16 feet, 100 meters = 328 feet,  
200 meters = 656 feet, 205 meters = 672 feet  
20  
 
   
AT-FH800 Series Installation Guide  
AT-FH806u Switch  
Module  
Network Bridging  
Function  
filtering, forwarding and learning  
Address Table  
Queue Buffer  
4K entries  
1M shared memory  
via fast hashing scheme  
Address Resolution  
Filtering Rate  
14,880 pps at 10 Mbps, 148,800 pps at 100 Mbps  
14,880 pps at 10 Mbps, 148,800 pps at 100 Mbps  
Forwarding Rate  
AT-FH807u Uplink  
Module  
100Base-FX  
Access Method  
CSMA/CD, 100 Mbps  
Standards Conformance  
Communication Rate  
Communication Mode  
Media Supported  
Number of Ports  
IEEE 802.3u 100Base-FX  
100 Mbps  
Half- or full-duplex (auto-negotiation)  
50/125 micron or 62.5/125 micron multimode fiber  
One 100Base-FX SC-type port  
Indicator Panel  
LEDs for port link, collision, transmit, receive, transmission  
mode  
AT-FH808u Uplink  
Module  
10Base-T/100Base-TX  
Access Method  
CSMA/CD, 10 or 100 Mbps  
Standards Conformance  
Communication Rate  
Communication Mode  
Media Supported  
IEEE 802.3u 100Base-TX  
10 or 100 Mbps (auto-negotiation)  
Half- or full-duplex (auto-negotiation)  
10Base-T 100 Ohm Category 3,4,5 UTP/STP, 100Base-TX  
100 Ohm Category 5 UTP/STP  
Number of Ports  
Indicator Panel  
One 10/100Base-TX RJ45 port (MDI-X or MDI connection)  
LEDs for port link, collision, activity, transmission mode  
21  
 
     
 
Appendix B  
Technical Support Fax Order  
Name__________________________________________________________________________  
Company_______________________________________________________________________  
Address________________________________________________________________________  
City _____________________ State/Province________________________________________  
Zip/Postal Code_________________ Country________________________________________  
Phone______________________________ Fax________________________________________  
Incident Summary  
Model number of Allied Telesyn product I am using________________________________  
Network software products I am using____________________________________________  
_______________________________________________________________________  
Brief summary of problem _______________________________________________________  
_______________________________________________________________________  
Conditions (list the steps that led up to the problem)________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
Detailed description (use separate sheet, if necessary_)______________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
When completed, fax this sheet to the appropriate Allied Telesyn office. Fax numbers  
can be found on page viii.  
23  
 
       
 
Appendix C  
AT-FH800 Series Installation Guide  
Feedback  
Please tell us what additional information you would like to see discussed in this guide.  
If there are topics you would like information on that were not covered in this guide,  
please photocopy this page, answer the questions and fax or mail this form back to  
Allied Telesyn. The mailing address and fax number are at the bottom of this page.  
Your comments are valuable when we plan future revisions of this guide.  
I found the following the most valuable ___________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
I would like the following more developed ________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
I would find the guide more useful if _____________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
_______________________________________________________________________  
Please fax or mail your feedback. Fax to 1-408-736-0100. Or mail to:  
Allied Telesyn International, Corp.  
c/o Technical Communications  
960 Stewart Drive, Suite B  
Sunnyvale, CA 94085 USA  
PN 613-10753-00 Rev G  
25  
 
     
 

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