Allied Telesis Network Hardware AT PC232 POE User Manual

Fast Ethernet  
Media Converter  
AT-PC232/POE  
Installation Guide  
613-001030 Rev. A  
 
Electrical Safety and Emissions Standards  
This product meets the following standards.  
U.S. Federal Communications Commission  
Declaration of Conformity  
Manufacturer Name: Allied Telesis, Inc.  
Declares that the product: Residential Gateway  
Model Numbers: AT-PC232/POE  
This product complies with FCC Part 15B, Class B Limits:  
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device  
must not cause harmful interference, and (2) this device must accept any interference received, including interference  
that may cause undesired operation.  
Radiated Energy  
Note: This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15  
of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential  
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in  
accordance with instructions, may cause harmful interference to radio or television reception, which can be determined  
by turning the equipment off and on. The user is encouraged to try to correct the interference by one or more of the  
following measures:  
-
-
-
-
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and the receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
Changes and modifications not expressly approved by the manufacturer or registrant of this equipment can void your  
authority to operate this equipment under Federal Communications Commission rules.  
Industry Canada  
This Class B digital apparatus complies with Canadian ICES-003.  
Cet appareil numérique de la classe B 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 B, EN55022 Class B, EN61000-3-2, EN61000-3-3, VCCI  
Class B, C-TICK, CE  
Immunity  
EN55024  
Electrical Safety  
EN60950 (TUV), UL 60950 (CULUS)  
Laser Safety  
EN60825  
3
 
Translated Safety Statements  
Important: The indicates that a translation of the safety statement is available in a PDF  
document titled “Translated Safety Statements” (613-000990) posted on the Allied Telesis website at  
4
 
Contents  
Preface ................................................................................................................................................................................11  
Chapter 1: Overview ..........................................................................................................................................................15  
Auto  
MDI/MDI-X............................................................................................................................................................................19  
5
 
Contents  
Chapter 2: Installation .......................................................................................................................................................33  
Chapter 3: Troubleshooting ..............................................................................................................................................49  
Appendix A: Technical Specifications .............................................................................................................................53  
Appendix B: Cleaning Fiber Optic Connectors ...............................................................................................................57  
6
 
Figures  
7
 
Figures  
8
 
Tables  
9
 
Tables  
10  
 
AT-PC232/POE Media Converter Installation Guide  
Preface  
This guide provides the hardware installation instructions for your AT-  
PC232/POE Media Converter. 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-PC232/POE Media Converter Installation Guide  
Where to Find Web-based Guides  
The installation and user guides for all Allied Telesis products are available  
in portable document format (PDF) on our web site at  
www.alliedtelesis.com. You can view the documents online or download  
them onto a local workstation or server.  
13  
 
 
Preface  
Contacting Allied Telesis  
This section provides Allied Telesis contact information for technical  
support as well as sales or corporate information.  
Online Support You can request technical support online by accessing the Allied Telesis  
Knowledge Base from the following web site:  
www.alliedtelesis.com/support. 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 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 a  
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.  
For Sales or You can contact Allied Telesis for sales or corporate information at our  
web site: www.alliedtelesis.com. Select your country from the list  
displayed on the website. Then select the appropriate menu tab.  
Corporate  
Information  
Warranty The AT-PC232/POE has a Five Year Warranty. Go to  
www.alliedtelesis.com/warranty for the specific terms and conditions of  
the warranty and for warranty registration.  
Management New releases of management software for our managed products are  
available from the following Internet sites:  
Software Updates  
ˆ Allied Telesis web site: www.alliedtelesis.com  
ˆ Allied Telesis FTP server: ftp://ftp.alliedtelesis.com  
You must have FTP client software and log in to the server to access the  
Allied Telesis FTP server from your workstation’s command prompt. The  
user name is “anonymous” and the password is your email address.  
14  
 
               
Chapter 1  
Overview  
The AT-PC232/POE Media Converter is designed to extend the distance  
of your network by converting 10 /100Base Ethernet data between copper  
and fiber network cables and to provide Power over Ethernet (PoE) power  
to a Powered Device (PD) connected to the copper port.  
This chapter contains the following sections:  
Section I: Basic Features  
15  
 
   
Chapter 1: Overview  
Introduction  
The AT-PC232/POE Media Converter is a 10/100Base-TX copper to  
100Base-FX fiber media converter is designed for both standalone and  
wall mount use and does not require software configuration or  
management.  
Figure 1 illustrates the front panel of the AT-PC232/POE Media Converter.  
1356  
Figure 1. AT-PC232/POE Front Panel  
Figure 2 illustrates the back panel of the AT-PC232/POE Media  
Converter.  
SPEED DUPLEX AUTO  
(Mbps) MODE  
NEG  
10  
100  
HALF  
FULL  
OFF  
ON  
1
2
3
4
2
1 2  
PORT  
2
100-240VAC~  
1357  
Figure 2. AT-PC232/POE Back Panel  
16  
 
     
AT-PC232/POE Media Converter Installation Guide  
Key Features  
The AT-PC232/POE Media Converter comes with the following features:  
One 10/100Base-TX twisted pair port with RJ-45 connector  
One 100Base-FX multi-mode fiber optic port with a duplex SC  
connector  
Supports half and full duplex operation  
Auto-MDI/MDI-X on the 10/100Base-TX port  
IEEE 802.3u compliant Auto-Negotiation  
IEEE 802.3af Power over Ethernet (PoE) compliant  
Supplies up to 15.4 W of PoE power on 10/100Base-TX twisted pair  
port  
Supports a maximum frame size of 1916 Bytes  
Transparent to IEEE802.1Q packets  
Supports MissingLinkoperating mode  
Supports Smart MissingLink operating mode  
LEDs for unit and port status  
Store and forward switching mode  
MAC address table capable of storing up to 1,000 MAC addresses  
Support of back-to-back and standalone topologies  
Supports installation on a desktop or wall-mounting  
Internal AC power supply  
AC receptacle power adapter with power cord retaining clip  
17  
 
 
Chapter 1: Overview  
10/100Base-TX Twisted Pair Port  
The 10/100Base-TX twisted pair port is described below:  
Type of The 10/100Base-TX twisted pair port on AT-PC232/POE Media Converter  
features an 8-pin RJ-45 connector. The port uses four pins when  
operating at 10 or 100 Mbps. For the port pinout details, refer to Figure 17  
Connector  
Port Speed The 10/100Base-TX twisted pair port can operate at 10 or 100 Mbps. The  
speed is set automatically through Auto-Negotiation or you can set the  
speed manually via the DIP switches located on the back of the unit. With  
Auto-Negotiation, the speed of the port is set automatically by the  
converter after it determines the speed of the end-node connected to the  
port. Auto-Negotiation is designed to ensure that the port on the converter  
and the end-node are operating at the same speed and that they are  
communicating at the highest possible common speed of the devices.  
Duplex Mode Duplex mode refers to how an end-node receives and transmits data. If an  
end-node can receive or transmit data, but not both simultaneously, 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 port is IEEE 802.3u-compliant and will Auto-Negotiate the  
duplex mode setting. It can be manually reconfigured to either full or half-  
duplex mode via the DIP switches located on the back of the unit when the  
Auto-Negotiate switch is in the OFF position.  
Note  
In order for a converter port to successfully Auto-Negotiate its  
duplex mode with an end-node, the link partner should also be using  
Auto-Negotiation. Otherwise, a duplex mode mismatch can occur.  
While configured for Auto-Negotiation, a converter port will default to  
half-duplex if it detects that its link partner is not using Auto-  
Negotiation. This will result in a mismatch if the end-node is  
operating at a fixed duplex mode of full-duplex.  
Maximum The 10/100Base-TX twisted pair port has a maximum operating distance  
of 100 meters (328 feet).  
Distance  
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AT-PC232/POE Media Converter Installation Guide  
Type of Cabling For 10 Mbps, the port requires Category 3 or better 100 ohm shielded or  
unshielded twisted pair cabling. For 100 Mbps operation, the port requires  
Category 5 or Enhanced Category 5 (5E) 100 ohm shielded or unshielded  
twisted pair cabling.  
Auto The 10/100Base-TX twisted pair port on the AT-PC232/POE Media  
Converter is auto-MDI/MDI-X and IEEE 802.3ab-compatible. The port  
MDI/MDI-X  
uses the auto-MDI/MDI-X feature to automatically configure itself as MDI  
or MDI-X when connected to an end-node. Consequently, you can use a  
straight-through twisted pair cable when connecting any network device to  
a port. The Auto MDI/MDI-X feature is always enabled even when the  
Auto- Negotiate feature is turned off and the speed and duplex mode on a  
port are set manually.  
Port Pinouts For the pinouts of the port when it is operating at 10 or 100 Mbps in the  
page 54. For the pinouts of the port when it is operating in the MDI-X  
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Chapter 1: Overview  
100Base-FX Fiber Optic Port  
The AT-PC232/POE Media Converter features a single fiber optic port.  
Type of The fiber optic port features a duplex SC connector.  
Connector  
Port Speed The fiber optic port has a fixed operating speed of 100 Mbps. The end-  
node connected to the port must also be able to operate at 100 Mbps. This  
speed cannot be changed.  
Duplex Mode The fiber optic port can operate in either full-duplex or half-duplex mode.  
You can set the duplex mode manually using the DIP switches after  
turning Auto-Negotiation off or you can let the media converter set it  
automatically with Auto-Negotiation turned on.  
Maximum The fiber optic port has a maximum operating distance of 2 Km (1.2 mi) in  
full duplex mode. The maximum operating distance of the port will be less  
if it is operating in half-duplex mode.  
Distance  
Type of Cable The fiber optic port on the AT-PC232/POE Media Converter uses multi-  
mode fiber optic cable.  
Power  
Sensitivity  
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AT-PC232/POE Media Converter Installation Guide  
Operating Modes  
The AT-PC232/POE Media Converter supports these operating modes:  
Link Test Mode Contrary to its name, the Link Test operating mode is not a diagnostic  
utility. Instead, it uses the Link LEDs to display the current states of the  
ports. A port’s Link LED will be on when the port has established a link to a  
network device and it will be off when the port does not have a link to a  
network device.  
This operating mode is typically used when the network devices  
connected to the ports of the media converter cannot take advantage of  
the features of the MissingLink mode, or when you want to use the Link  
LEDs to troubleshoot a network problem. This operating mode is also  
useful after the installation of the media converter to verify whether or not  
the ports on the unit have established links to their network devices.  
MissingLink The MissingLinkTM mode allows the two ports on the media converter to  
share their “link” status with each other. If one of the ports is unable to  
Mode  
establish a link with its network device or loses the link, this operating  
mode disables the transmitter on the other port. This action notifies the  
network device connected to the port that there is a loss of the link on the  
other port. Without the MissingLink mode, a network device connected to a  
port would be unaware of a loss of a link on the companion port, because  
its link to the media converter would be unaffected. To explain it another  
way, the MissingLink mode will not allow a port to form a link with its  
network device unless the other port on the media converter can also  
establish a link with its device.  
When the link is reestablished on a port, the MissingLink mode  
automatically reactivates the transmitter on the companion port so that the  
two network devices can again forward traffic to each other through the  
two ports of the media converter.  
The value to this type of fault notification is that some network devices,  
such as managed Fast Ethernet switches, can respond to the loss of a link  
on a port by performing a specific action. For example, the network device  
might send a trap to a network management station, and so alert the  
network administrator of the problem. Or, if the device is running a  
spanning tree protocol, it might seek a redundant path to a disconnected  
node.  
Here is an example of how the MissingLink mode works. Assume that the  
two ports on a media converter are connected to two Fast Ethernet  
21  
 
     
Chapter 1: Overview  
switches, one local and the other remote. Switch 1, the remote switch, is  
connected to port 1, the fiber optic port, on the media converter, while  
Switch 2, the local device, is connected to port 2, the twisted pair port. If  
the link to Switch 1 is lost, the line card disables the transmitter on port 2 to  
signal Switch 2 of the loss of the link to Switch 1. This notifies Switch 2 of  
the problem so it too, along with Switch 1, can take remedial action, such  
as activating a redundant path if it is running a spanning tree protocol, or  
sending an SNMP trap to a management workstation. Without the  
MissingLink mode, Switch 2 would be unaware of the problem because it  
would still have a valid link to the media converter.  
In the example the initial loss occurred on port 1. But the operating mode  
operates the same when the initial loss of the link is on port 2. Here, the  
transmitter on port 1 is disabled to notify the node connected to that port of  
the loss of the link on port 2.  
The states of the ports on the media converter running in this mode  
operate in tandem. Either both of the ports have a link or neither of the  
ports. This is reflected on the Link LEDs. If both ports can form links with  
their network devices, their Link LEDs will both be on. But if one or both  
ports cannot establish a link, then the Link LEDs will be off.  
This operating mode is most useful when the network devices connected  
to the ports of the media converter can react to a loss of a link on a port,  
such as managed Fast Ethernet switches running SNMP or a spanning  
tree protocol. Conversely, the MissingLink mode will be of little value if the  
network devices of the media converter cannot react to a lost link. In the  
latter scenario, the Link Test mode would probably be a better operating  
mode for the media converter during normal network operations.  
Furthermore, Allied Telesis does not recommend using the MissingLink  
mode when troubleshooting a network problem that may have its roots  
with a link problem. The MissingLink mode will not allow you to use the  
port’s Link LEDs or the management software to diagnose the problem,  
since neither port will show a link. Rather, the Link Test and the Smart  
MissingLink modes are more useful when troubleshooting a link problem.  
Smart The Smart MissingLink mode is nearly identical to the MissingLink mode.  
It, too, enables the two ports on the media converter to share the link  
MissingLink  
Mode  
status of their connections. This mode is different in that it does not  
completely shut off the transmitter of a port when the companion port  
loses its link. Rather, this operating mode pulses the port’s transmitter and  
flashes the port’s Link LED once a second to signal that the port can still  
establish a link to its network device and that the loss of the link originated  
on the companion port on the media converter.  
The advantage of this operating mode over the MissingLink mode is that  
you can use the Link LEDs on the media converter to troubleshoot a link  
failure with the ports. As an example, assume that the fiber optic port on a  
media converter lost its link to its network device. The mode would  
22  
 
 
AT-PC232/POE Media Converter Installation Guide  
respond by pulsing the transmitter on the twisted pair port and flashing the  
port’s Link LED about once a second to signal that the failure originated on  
the fiber optic port. When the connection is reestablished on the fiber optic  
port, the twisted pair port would automatically resume normal operations to  
permit the two ports to forward traffic again.  
The operating mode functions the same if the failure starts on the twisted  
pair port. Here, the mode pulses the transmitter on the fiber optic port.  
As with the other operating modes, this mode does not interfere with the  
flow of network traffic through the ports of a media converter during normal  
network operations of a media converter. However, Allied Telesis  
recommends limiting its use to diagnosing link failures, particularly if the  
network devices connected to the ports are managed devices. The pulsing  
of the transmitter on a port and the constantly changing status of a link  
could prove problematic for some managed devices. For example, the  
device might send a constant stream of SNMP traps or, if the device is  
running a spanning tree protocol, the protocol might become confused as  
the status of the device’s link to the media converter constantly changes.  
Setting the You set the operating mode on the media converter using the Mode select  
on the front panel of the unit. Setting the mode does not interfere with the  
network operations of the device. To set the operating mode, use a  
pointed object such as a pen to depress the Mode button.  
Operating Mode  
23  
 
 
Chapter 1: Overview  
Power over Ethernet  
The twisted pair port on the AT-PC232/POE Media Converter features  
Power over Ethernet (PoE). PoE is a mechanism for supplying power to  
network devices over the same twisted pair cables used to carry network  
traffic. This feature can simplify network installation and maintenance by  
allowing you to use the switch as a central power source for other network  
devices.  
A device that receives its power over an Ethernet cable is called a  
powered device (PD). Examples of such devices can be wireless access  
points, IP telephones, web cams, and Ethernet switches.  
There are several advantages that the PoE feature of the AT-PC232/POE  
Media Converter adds to the installation and maintenance of your network.  
First, because the media converter acts as the power source for the  
powered device, adding an uninterruptible power source (UPS) to the  
media converter increases the protection not just to the media converter  
itself from possible power source problems but also to the powered device  
connected to it. This can increase the reliability of your network by  
minimizing the impact to network operations from a power failure.  
PoE can also simplify the installation of your network. A frequent issue in  
selecting a location for a network device is whether there is a power  
source nearby. This often limits equipment placement or requires the  
added cost and time of having additional electrical sources installed. With  
PoE, you can install PoE-compatible network equipment wherever they  
are needed without having to worry about whether they are near a power  
source.  
The media converter can automatically determine whether or not a device  
connected to its port is a powered device. A powered device has a  
signature resistor or capacitor that the media converter can detect over  
the Ethernet cabling. If the resistor or capacitor is present, the media  
converter assumes that the device is a powered device.  
The twisted pair port on the AT-PC232/POE Media Converter can supply  
up to 15.4 watts of power, while at the same time furnishing standard  
10/100 Mbps Ethernet functionality. If the twisted pair port is connected to  
a network node that is not a powered device, it functions as a regular  
Ethernet port without PoE. The PoE feature remains enabled on the port  
but no power is delivered to the device.  
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AT-PC232/POE Media Converter Installation Guide  
Power Budgeting The AT-PC232/POE Media Converter can provide a maximum of 15.4 W  
of power on its twisted pair port (Port 2), along with standard 10/100 Mbps  
Ethernet functionality.  
The AT-PC232/POE Media Converter smart power management  
functionality supports all of the IEEE 802.3af powered device classes  
listed in Table 2.  
Table 2. IEEE 802.3af Class vs. Power Levels  
Minimum Power  
Levels Output at  
the PSE  
Maximum Power  
Levels Output at  
the PD  
Class  
Usage  
0
1
2
3
Default  
Optional  
Optional  
Optional  
15.4W  
4.0W  
0.44W to 12.95W  
0.44W to 3.84W  
3.84W to 6.49W  
6.49W to 12.95W  
7.0W  
15.4W  
If the twisted pair port is connected to a network node that is not a  
powered device (that is, a device that receives its power from another  
power source), the port functions as a regular Ethernet port, without PoE.  
The PoE feature remains enabled on the port but no power is delivered to  
the device.  
Implementation A standard Ethernet twisted pair cable contains four pairs of strands for a  
total of eight strands. 10/100 Mbps network traffic requires only four  
strands (1, 2, 3, and 6), leaving four strands in the cable unused (4, 5, 7,  
and 8).  
The PoE standard, IEEE 802.3af, describes two alternative ways for  
delivering power to a powered device (PD) over twisted pair cabling.  
Alternative A uses the same strands that carry the network traffic.  
Alternative B uses the spare strands. The PoE implementation on the AT-  
PC232/POE Media Converter is Alternative A, where power is transmitted  
over strands 1, 2, 3, and 6.  
PD’s that comply with the IEEE 802.3af standard typically support both  
power delivery methods. So long as a PD is compliant with the standard, it  
should be able to receive its power from the media converter while using  
either a straight or cross-over cable. The PoE feature on the AT-PC232/  
POE Media Converter should also work with most legacy PD’s as long as  
the device can be powered on pins 1, 2, 3, and 6.  
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Chapter 1: Overview  
LEDs  
The LEDs on the AT-PC232/POE Media Converter, are shown in Figure 3  
and are described in the following sections:  
OPERATING MODE  
POWER STATUS  
LED  
LEDs  
1356  
PoE  
10/100Base-TX PORT  
LEDs  
100BASE-FX PORT  
LEDs  
PWR LEDs  
Figure 3. LEDs on the AT-PC232/POE Media Converter  
Power LED The function of the PWR LED is defined in Table 3.  
Table 3. System Status LED  
LED  
Color  
Description  
PWR  
Green  
Off  
Indicates that the unit power is ON.  
Indicates that the converter power is OFF.  
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AT-PC232/POE Media Converter Installation Guide  
10/100Base-TX the LEDs for the 10/100Base-TX twisted pair port defined in Table 4,  
Twisted Pair Port  
LEDs  
Table 4. Twisted Pair Port LEDs  
LED  
Color  
Description  
Green  
A valid link has been established on the port.  
Blinking Indicates that when the AT-PC232/POE Media  
LINK  
Green  
Converter is in SML mode, the LINK on the  
100BASE-FX port is lost.  
Off  
A port has not established a link with an end node.  
Blinking Indicates that the port is transmitting and/or  
ACT  
100  
Green  
receiving data packets.  
Off  
Indicates that there is no activity on the port.  
Indicates that the port is operating at 100 Mbps.  
Green  
OFF  
*With the LINK LED either Green or Blinking  
Green:  
Indicates that the port is operating at  
10 Mbps.  
AUTO  
NEG  
Green  
Off  
Indicates that Auto-Negotiation is ON.  
Indicates that Auto-Negotiation is OFF.  
100Base-FX The two LEDs for the are defined in Table 5.  
Fiber Optic Port  
LEDs  
Table 5. Fiber Optic Port LEDs  
LED  
Color  
Description  
Green  
Indicates a valid link has been established  
between the port and the end-node.  
Blinking Indicates that when the AT-PC232/POE Media  
Green  
Converter is in SML mode, the LINK on the  
100BASE-TX port is lost.  
LINK  
Off  
Indicates that there is no link between the port  
and the end-node.  
Blinking Indicates that the port is transmitting and/or  
ACT  
Green  
receiving data packets.  
Off  
Indicates that there is no activity on the port.  
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Chapter 1: Overview  
Operating Mode The three LEDs listed under MODE on the front panel display the  
operating mode of the media converter. The LEDs are defined in Table 6  
LEDs  
on page 28. Beside these LEDs is a button for setting the operating mode.  
Table 6. Operating Mode LEDs  
LED  
ML  
Color  
Description  
Green  
Green  
Green  
MissingLink mode is enabled.  
Smart MissingLink mode is enabled.  
Link Test mode is enabled.  
SML  
LT  
PoE PWR LEDs If the end-node that is connected to the twisted pair port on the media  
converter is a Powered Device (PD), you can use the three PoE PWR  
LED’s to determine its class ID, as defined in the IEEE802.3af PoE  
specification. The LEDs are described in Table 7 on page 28.  
Table 7. PoE PWR LEDs  
LED  
4W  
Color  
Description  
Green  
Green  
Green  
Indicates that the PD device is Class 1..  
Indicates that the PD device is Class 2..  
Indicates that the PD device is Class 0 or 3..  
7W  
15W  
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AT-PC232/POE Media Converter Installation Guide  
DIP Switches  
The DIP switches are used to manually configure the operating  
characteristics of the 10/100BASE-TX twisted-pair port (Port 2), such as  
port speed, duplex mode, and Auto-Negotation and the duplex mode for  
the 100BASE-FX fiber port (Port 1). For the DIP switch setting, refer to  
29  
 
 
Chapter 1: Overview  
A Few Basics about Ethernet Switching  
The AT-PC232/POE Media Converter 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 The operation of the AT-PC232/POE Media Converter’s MAC address  
table reduces the amount of unnecessary traffic by not forwarding packets  
with a destination address that has been learned on the same port.  
Table  
Store and The AT-PC232/POE Media Converter supports store and forward  
switching at Fast Ethernet full-wire speed in 100 Mbps, half- or full-duplex  
Forward  
mode. Packets entering each port are stored in buffers. Once the full  
packet is received, the media converter will forward or discard the packet,  
depending on its destination address and error status. This ensures the  
only error-free packets destined for another segment will be transferred  
across the media converter, reducing network load.  
The AT-PC232/POE Media Converter will discard CRC errors, misaligned,  
runt, and under-oversized packets. When the packet has dribble bits at the  
end, the media converter will truncate to octet boundary and check for a  
good FCS before forwarding.  
30  
 
     
AT-PC232/POE Media Converter Installation Guide  
Network Topologies  
Standalone A standalone topology uses only one AT-PC232/POE Media Converter  
between a switch and each end-node. Figure 4 illustrates an example of a  
Topology  
standalone topology where several AT-PC232/POE Media Converters are  
used to interconnect a number of PoE network Power Devices, such as  
VoIP phones, AT-7400 Wireless Access Points, and a network camera.  
An AT-8516F switch is connected to multiple AT-PC232/POE Media  
Converters via their 100Base-FX ports. The AT-PC232/POE Media  
Converters are capable of providing a connection of up to 2 kilometers  
(1.24 miles) from the switch over the fiber cable. The 10/100Base-TX  
twisted pair ports of the media converters deliver PoE power to the twisted  
pair ports on the different PoE Power Devices as shown in Figure 4  
VoIP  
Phone  
VoIP  
Phone  
PoE Connection  
100 m (328 ft)  
maximum  
AT-PC232/POE  
AT-PC232/POE  
AT-8516F  
L/A  
D/C  
PORT ACTIVITY  
L/A  
LINK  
/
ACTIVITY  
L/A  
FULL DUP HALF DUP/  
L/A  
COL  
6
L/A  
L/A  
L/A  
L/A  
D/C  
L/A  
AT-8516F/SC  
100Base-FX Fast Ethernet Switch  
RS-232 TERMINAL PORT  
STATUS  
FAULT  
D/C  
D/C  
L/A  
D/C  
RX  
D/C  
L/A  
D/C  
D/C  
L/A  
D/C  
L/A  
TX  
1
RX  
TX  
TX  
2
RX  
RX  
TX  
TX  
3
TX  
TX  
4
RX  
RX  
TX  
TX  
5
RX  
RX  
TX  
TX  
RX  
RX  
TX  
TX  
7
RX  
RX  
TX  
TX  
8
RX  
RX  
17 18  
L/A  
L/A  
L/A  
L/A  
MASTER  
PWR  
D/C  
D/C  
D/C  
RX  
D/C  
D/C  
D/C  
D/C  
D/C  
TX  
9
RX  
10  
11  
12  
13  
14  
15  
16  
1383  
Fiber Connection  
2km (1.2 mi)  
maxiimum  
AT-PC232/POE  
AT-PC232/POE  
AT-PC232/POE  
VoIP  
Phone  
PoE Camera  
RESET TO DEFAULT  
5V,2.8A  
LAN  
AT-WA7400  
Figure 4. Standalone Topology  
31  
 
     
Chapter 1: Overview  
Back-to-Back In some network configurations you may want to interconnect two AT-  
PC232/POE Media Converters in what is referred to as a back-to-back  
topology. In this topology, the AT-PC232/POE Media Converters not only  
extend the distance of your network but also converts the fiber optic cable  
from twisted pair to fiber optic and back again. Figure 5 illustrates one  
AT-9424T switch at campus 1 and one AT-WA7400 Wireless Access  
Point on campus 2. The switch and access point are interconnected by  
two AT-PC232/POE Media Converters which provide a connection of up  
to 2 kilometers (1.24 miles). The 10/100Base-TX twisted pair ports on the  
AT-PC232/POE Media Converters are connected to the SC ports on the  
switches, while the 100Base-FX ports on the two AT-PC232/POE Media  
Converters are directly connected to each other.  
Topology  
Note  
When using two AT-PC232/POE Media Converters back-to-back,  
you must set both AT-PC232/POE Media Converters to the same  
mode. For example, the first AT-PC232/POE Media Converter is set  
to Smart MissingLink mode, so the second media converter must  
also be set to Smart MissingLink mode.  
Campus 1: AT-9424T  
AT-9424T Gigabit Ethernet Switch  
1
3
5
7
9
11  
13  
15  
17  
19  
21R  
23R  
PORT ACTIVITY  
ACT 10/100 LINK  
CLASS  
1
SFP  
L/A  
TERMINAL  
PORT  
STATUS  
LASER PRODUCT  
L/A  
D/C  
1000 LINK  
FDX  
/
/
ACT  
HDX  
/
COL  
1
2
3
4
5
6
7
8
9
11 13 15 17 19 21R 23R  
L/A  
D/C  
L/A  
D/C  
21  
FAULT  
SFP  
22  
23  
24  
MASTER  
POWER  
10 12 14 16 18 20 22R 24R  
2
4
6
8
10  
12  
14  
16  
18  
20  
22R  
24R  
21  
22  
23  
24  
100 m (328 ft)  
maximum  
AT-PC232/POE  
AT-PC232/POE  
2km (1.2 mi)  
maxiimum  
Multi-mode  
Fiber Optic  
Twisted Pair  
RESET TO DEFAULT  
5V,2.8A  
LAN  
1377  
Campus 2: AT-WA7400 AP  
Figure 5. Back-to-Back Topology  
32  
 
   
Chapter 2: Installation  
Verifying the Package Contents  
Make sure the following items are included in your package. If any item is  
missing or damaged, contact your Allied Telesis sales representative for  
assistance.  
One AT-PC232/POE Media Converter  
One AC power cord  
One AC power cord retaining clip  
Four rubber protective feet  
Two anchors  
Two screws  
One documentation CD  
34  
 
 
AT-PC232/POE Media Converter Installation Guide  
Planning the Installation  
Observe the following guidelines when planning the installation of your AT-  
PC232/POE Media Converter:  
The end-node connected to the 100Base-FX port must be compatible.  
The 10/100Base-TX twisted pair port may be set to match the speed  
and mode of the connected device or allowed to Auto-Negotiate.  
The end-node connected to a port on the AT-PC232/POE Media  
Converter can be any other ethernet network device, such as an  
adapter card, repeater, router, access point, or a switch.  
The twisted pair cabling must be kept away from sources of electrical  
noise, such as radios, transmitters, power lines, broadband amplifiers,  
electrical motor, and fluorescent fixtures.  
Table 8 lists the twisted pair port cabling specifications.  
Table 8. Twisted Pair Cabling and Distance Specifications  
Maximum  
Speed  
Type of Cable  
Operating  
Distance  
10 Mbps Standard TIA.EIA 568-B-compliant  
Category 3 or better shielded or  
100 m (328 ft)  
unshielded twisted cabling with 100 ohm  
impedance and a frequency of 16 MHz.  
100  
Standard TIA.EIA 568-B-compliant  
100 m (328 ft)  
Mbps  
Category 5 or Standard TIA.EIA 568-B-  
compliant Category 5 (Cat 5e) shielded or  
unshielded twisted cabling with 100 ohm  
impedance and a frequency of 100 MHz.  
Table 9 lists the fiber optic port cabling specifications.  
Table 9. Fiber Optic Cabling and Distance Specifications  
Maximum  
Speed  
Cable Type  
Operating  
Distance  
100  
Mbps  
50/125 µm or 62.5/125 µm (core cladding) 2 km (1.24 mi.)  
multimode fiber optic cable  
35  
 
       
Chapter 2: Installation  
Selecting a Site When selecting a site for your AT-PC232/POE Media Converter, observe  
the following guidelines:  
Select a site that is dust-free and moisture-free.  
The site should allow for easy access to the fiber optic and twisted pair  
cables and to the power cord.  
If the media converter will be installed on a table, the table should be  
level and secure.  
Do not place objects on top of the media converter.  
Air flow around the unit and through its vents should be unrestricted.  
The power outlet for the device should be located near the unit and be  
easy to access.  
Use a dedicated power circuit or power conditioner to supply reliable  
power to the unit.  
Reviewing the Please review the following safety guidelines before you begin to install  
the AT-PC232/POE Media Converter.  
Safety Guidelines  
Note  
The indicates that a translation of the safety statement is  
available in a PDF document titled “Translated Safety Statements”  
(613-000990) posted on the Allied Telesis website at  
documentation CD that is shipped with the product.  
Warning: Class 1 Laser product. L1  
Warning: Do not stare into the laser beam. L2  
Warning: Class 1 LED product. L3  
Warning: The fiber optic ports contain a Class 1 laser device.  
When the ports are disconnected, always cover them with the  
provided plug. Exposed ports may cause skin or eye damage ꢀ  
L4  
36  
 
   
AT-PC232/POE Media Converter Installation Guide  
Caution: Using controls, making adjustments to performance, or  
performing procedures other than those specified herein may  
result in hazardous radiation exposure.  
The protection provided by the equipment may be impaired if the  
equipment is used in a manner not specified by Allied Telesis,  
Inc.  
Do not remove the cover from the unit or change any of the  
internal cables or wiring. Only an authorized Allied Telesis  
service technician should make repairs to this device.  
The TX and RX multiplexing ports contain embedded Class 3B  
lasers operating in Class 1 compliance. Do not make any  
modifications to the unit that would override the safeguards that  
maintain the Class 1 compliance.  
The laser light used by the multiplexing ports and SFP modules  
is invisible. Standard safety precautions (e.g. avoid looking  
directly into a fiber optic port) should always be observed when  
installing or maintaining this product. L5  
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: Power cord is used as a disconnection device. To de-  
energize equipment, disconnect the power cord. E3  
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. E4  
Pluggable Equipment. The socket outlet shall be installed near  
the equipment and shall be easily accessible. E5  
Caution: Air vents must not be blocked and must have free  
access to the room ambient air for cooling. E6  
37  
 
Chapter 2: Installation  
Warning: Operating Temperature. This product is designed for a  
maximum ambient temperature of 40° degrees C. E7  
All Countries: Install product in accordance with local and  
National Electrical Codes. E8  
Circuit Overloading: Consideration should be given to the  
connection of the equipment to the supply circuit and the effect  
that overloading of circuits might have on overcurrent protection  
and supply wiring. Appropriate consideration of equipment  
nameplate ratings should be used when addressing this  
concern. E21  
Warning: Do not look directly at the fiber optic cable ends or  
inspect the cable ends with an optical lens. E29  
Warning: To reduce the risk of electric shock, the PoE ports on  
this product must not connect to cabling that is routed outside the  
building where this device is located. E40  
Caution: The unit does not contain serviceable components.  
Please return damaged units for servicing.  
Caution: The AT-PC232/POE Ethernet port is only intended for  
installation in Environment A as defined in IEEE 802.3af. All  
interconnected equipment must be contained in the same  
building including the interconnected equipment’s associated  
LAN connections.  
38  
 
AT-PC232/POE Media Converter Installation Guide  
Desktop Installation  
Install the AT-PC232/POE Media Converter on a desktop, perform the  
following procedure:  
1. Remove the converter from its shipping container and store the  
packaging material in a safe location.  
2. Turn the converter over and place it on a secure surface.  
3. Attach the four rubber feet included with the unit to the corners of the  
bottom of the media converter, as shown in Figure 6.  
1362  
Figure 6. Attaching Rubber Feet  
Do not apply power at this time. Proceed to “Wall-Mount Installation” on  
39  
 
   
Chapter 2: Installation  
Wall-Mount Installation  
The AT-PC232/POE Media Converter can be mounted vertically on a wall  
using the keyholes on the bottom of the switch. Two plastic anchors and  
screws necessary to mount the switch on a wall are provided in the  
accessory kit.  
To wall-mount the switch, perform the following procedure:  
1. If attached, remove the rubber feet, data cables, and power cord from  
the switch.  
2. Select a wall location for the switch.  
3. Install two plastic anchors and two screws into the wall so that they are  
level with each other and spaced 64 mm (2.52 in) apart.  
4. Position the switch onto the wall screws, as illustrated in Figure 7.  
1364  
Figure 7. Positioning the Switch onto the Wall Screws  
40  
 
   
AT-PC232/POE Media Converter Installation Guide  
Cabling the Ports  
Perform the following procedures to connect the network cables on the  
AT-PC232/POE Media Converter.  
Cabling the Fiber To connect to the fiber optic port (Port 1) on the AT-PC232/POE Media  
Converter, perform the following procedure.  
Optic Ports  
1. Remove the dust cover from the fiber optic port, as shown in Figure 8  
1372  
Figure 8. Removing the Dust Cover from the Fiber Optic Port  
2. Connect the fiber optic cable to the port, as shown in Figure 9 on page  
1373  
Figure 9. Connecting to the Fiber Optic Ports  
When attaching a fiber optic cable, observe the following guidelines:  
Be sure that the cable connector firmly locks into place in the port.  
41  
 
       
Chapter 2: Installation  
Verify that you are using the appropriate type of fiber optic cabling.  
Verify that the operating specifications of the converter’s fiber optic  
port are compatible with the fiber optic port on the remote end-  
node.  
The fiber optic port has two SC connectors, as shown in  
Figure 10 on page 42. Each connects to a separate fiber strand.  
One is for receiving data and the other is for transmitting data.  
When connecting a fiber optic cable to the port, be sure that the  
receiver fiber connector is connected to the transmitter connector  
on the remote end-node, and the transmitter fiber connector is  
connected to the receiver connector on the remote node.  
Receiving  
Fiber  
Transmitting  
Fiber  
TX  
1
RX  
Connector  
Connector  
Figure 10. SC Ports  
3. Connect the other end of the optical cable to the link partner.  
Connecting to the To connect a twisted pair cable to Port 2 on the AT-PC232/POE Media  
Converter, perform the following procedure:  
Copper Port  
1. Connect a twisted pair cable with an RJ-45 connector to the  
10/100Base-TX port, as shown in Figure 11.  
1374  
Figure 11. Connecting to the RJ-45 Copper Ports  
When connecting a twisted pair cable to an RJ-45 twisted pair port,  
observe the following guidelines:  
An RJ-45 connector should fit snugly into the port on the converter.  
The tab on the connector should lock the connector into place.  
42  
 
     
AT-PC232/POE Media Converter Installation Guide  
You can use a straight-through or crossover twisted pair cable to  
connect any type of network device to a port on the converter.  
2. Connect the other end of the RJ-45 cable to the link partner.  
43  
 
Chapter 2: Installation  
Configuring the DIP Switches  
Configure the DIP switches using the information in Table 10.  
Table 10. DIP Switch Settings  
Port Function Position Description  
UP  
DIP  
Switch  
The twisted pair port operates at  
10 Mbps..  
SPEED  
(Mbps)  
1
2
2
DOWN The fiber port operates at  
100 Mbps  
UP  
The fiber port operates in half-duplex  
mode.  
1
DUPLEX  
DUPLEX  
DOWN The fiber port operates in full-duplex  
mode.  
UP  
The twisted pair port operates in  
half-duplex mode.  
3
4
2
2
DOWN The twisted pair port operates in  
full-duplex mode.  
AUTO  
NEG  
UP  
Auto-negotiation on both ports is OFF..  
DOWN Auto-negotiation on both ports is ON  
When setting the DIP switches, consider the following:  
DIP switch 4 controls Auto-Negotiation on both ports. When Auto-  
Negotiation is enabled, the duplex mode on the fiber optic port and the  
speed and duplex mode on the twisted pair port are set automatically  
by the media converter. When Auto-Negotiation is disabled, you can  
use the other DIP switches to manually configure these settings.  
If you enable Auto-Negotiation, be sure that the end-nodes are also  
configured for Auto-Negotiation.  
44  
 
     
AT-PC232/POE Media Converter Installation Guide  
Installing the Power Cord Retaining Clip  
Perform the following procedure to install the power cord retaining clip on  
the AT-PC232/POE Media Converter:  
1. Locate the power cord retaining clip, shown in Figure 12 in the  
shipping kit that comes with the media converter.  
Figure 12. Power Cord Retaining Clip  
2. Install the clip on the AC power connector on the back panel of the  
switch. With the “u” of the clip facing down, press the sides of the clip  
toward the center and insert the short ends into the holes in the  
retaining bracket, as shown in Figure 13.  
S
P
E
E
D
(M  
D
b
U
P
O
p
s
L
EX  
D
)
M
AU  
T
E
10  
10  
O
N
E
G
H
A
L
0
F
F
U
LL  
O
F
ON  
F
1
2
3
4
2
1
2
T
2
POR  
100-240V  
A
C
~
1379  
SPEE  
(Mb  
D
DUPL  
ps)  
EX  
MOD  
AU  
E
T
O
10  
NEG  
1
00  
H
A
FU  
L
F
L
L
O
F
ON  
F
1
2
2
1
3
2
RT  
4
2
PO  
100-240V  
A
C
~
1380  
Figure 13. Inserting the Retaining Clip into the Retaining Bracket  
45  
 
     
Chapter 2: Installation  
Applying AC Power  
To apply AC power to the AT-PC232/POE Media Converter, perform the  
following procedure:  
1. Position the power cord retaining clip in the up position, shown in  
SPEE  
D
(Mbps)  
DUPL  
EX  
MOD  
HA  
AU  
E
T
O
10  
10  
0
NEG  
L
F
FUL  
OFF  
ON  
L
1
2
2
3
2
4
1
2
POR  
T
100  
-240V  
A
C
~
1381  
Figure 14. Power Cord Retaining Clip in the Up Position  
2. Plug the power cord into the AC power connector on the back panel of  
the unit shown in Figure 15.  
Warning: Power cord is used as a disconnection device. To de-  
energize equipment, disconnect the power cord. E3  
.
SPEE  
ps)  
D
(Mb  
DUPL  
EX  
MOD  
AU  
E
T
O
10  
NE  
10  
G
HAL  
FUL  
0
F
OFF  
ON  
L
1
2
2
3
2
4
1
2
POR  
T
0  
-240V  
A
C
~
1378  
Figure 15. Connecting the AC Power Cord  
46  
 
     
AT-PC232/POE Media Converter Installation Guide  
3. Lower the power cord retaining clip to secure the cord to the AT-  
PC232/POE Media Converter, as shown in Figure 16.  
SPEE  
D
(M  
DU  
OD  
H
FU  
b
ps)  
P
LE  
X
M
AU  
T
E
10  
100  
O
NEG  
AL  
F
L
L
O
F
ON  
F
1
2
3
4
2
1
2
T
2
POR  
A  
C
~
1382  
Figure 16. Securing the Power Cord with the Retaining Clip  
4. Connect the other end of the power cord to an appropriate AC power  
outlet. For the power specifications of the media converter, refer to  
The AT-PC232/POE Media Converter is now ready for network  
operations.  
47  
 
 
Chapter 2: Installation  
Verifying the Installation  
This procedure is used to verify the installation of the media converter. It  
determines whether or not the fiber optic and twisted pair ports can  
establish links to their network devices. This procedure assumes the  
following:  
ˆ The media converter is powered on.  
ˆ The network cables are connected to the ports on the media converter  
and to the local and remote end-nodes.  
ˆ The local and remote network devices are powered on.  
To verify the installation of the media converter, perform the following  
procedure:  
1. Place the media converter in the Link Test operating mode by pressing  
the Mode selector button until the LT LED is on.  
2. Observe the Link LEDs of the twisted pair and fiber optic ports on the  
media converter.  
ˆ If the Link LEDs for both of the ports are on, the ports have  
established links with their network devices, which may already be  
forwarding network traffic to each other through the media  
converter. You can either leave the unit in the Link Test mode  
during normal operations or, by pressing the Mode selector button  
again, change it to the MissingLink or Smart MissingLink mode.  
The MissingLink mode is active when the ML LED is on and the  
Smart MissingLink mode is active when the SML LED is on.  
ˆ If the Link LED for a port is off, the port is unable to establish a link  
to its network device. For suggestions on how to resolve the  
problem, go to Chapter 3, Troubleshooting on page 47.  
48  
 
 
Chapter 3  
Troubleshooting  
Here are suggestions on how to troubleshoot the twisted pair port and the fiber  
optic port on the AT-PC232/POE Media Converter.  
Problem 1: The two ports are connected to network devices, but the Link LEDs  
for the ports are off.  
Solution: The first step to resolving a link problem between the ports on the  
media converter and the network devices is to set the operating mode of the unit  
to the Smart MissingLink mode or the Link Test mode. These modes allow you to  
use the Link LEDs to identify which port is unable to establish a link to its network  
device. The operating mode is set with the Mode selector button.  
After setting the unit to the Smart MissingLink or Link Test mode, observe the Link  
LEDs again. If the Link LED for the twisted pair port is off, go to Problem 2. If the  
Link LED for the fiber optic port is off, go to Problem 3.  
Problem 2: The Link LED for the fiber optic port is on or blinking, but the Link LED  
for twisted pair port is off.  
Solution: The twisted pair port has not established a link with its network device.  
Try the following:  
ˆ Verify that the network device connected to the twisted pair port is powered on  
and operating properly.  
ˆ Verify that the twisted pair cable is securely connected to the port on the media  
converter and to the port on the remote network device.  
ˆ Try connecting another network device to the twisted pair port with a different  
cable. If the twisted pair port is able to establish a link, then the problem is with  
the cable or the other network device.  
Problem 3: The Link LED of the twisted pair port is on or blinking, but the Link  
LED of the fiber optic port is off.  
Solution: The fiber optic port is unable to establish a link to its network device. Try  
the following:  
ˆ Verify that the network device connected to the fiber optic port is operating  
properly.  
ˆ Verify that the fiber optic cable is securely connected to the port on the media  
converter and to the port on the remote network device.  
Section II: Advanced Operations  
49  
 
   
Chapter 3: Troubleshooting  
ˆ Verify that the operating specifications of the fiber optic port on the  
remote network device are compatible with the port on the media  
converter. For port specifications, refer to “100Base-FX Port  
ˆ Verify that the correct type of fiber optic cabling is being used. For  
ˆ Try connecting another network device to the fiber optic port using a  
different cable. If the twisted pair port is able to establish a link, then  
the problem is with the cable or the other network device.  
ˆ If the remote network device is a management device, use its  
management firmware to determine whether its port is enabled.  
ˆ Test the attenuation on the fiber optic cable with a fiber optic tester to  
determine whether the optical signal is too weak (i.e., sensitivity) or too  
strong (i.e., maximum input power). The specifications of the fiber  
optic ports on the media converter can be found in “100Base-FX Port 1  
Problem 4: The Link LEDs for the two ports are on but the network  
devices are unable to forward traffic to each other through the media  
converter.  
Solution: Try the following:  
ˆ If the network devices are managed devices, use their management  
firmware to determine whether they are configured and operating  
properly.  
ˆ If one of the network devices is a switch using a spanning tree  
protocol, use its management firmware to determine the status of the  
switch port connected to the media converter. The port may have been  
placed in the blocking mode by the switch if it is part of a redundant  
path.  
Problem 5: Two network devices are forwarding traffic through the media  
converter, but performance is slow.  
Solution: Try the following:  
ˆ There might be a duplex mode mismatch between the twisted pair port  
and the network device connected to the port. A duplex mode  
mismatch occurs when a twisted pair port using Auto-Negotiation is  
connected to a device with a fixed duplex mode of full duplex. If this is  
the cause of the problem, you must adjust the duplex mode of the port  
on the network device or the twisted pair port on the media converter  
so that both ports are using the same duplex mode.  
50  
Section II: Advanced Operations  
 
AT-S63 Web Browser User’s Guide for AT-9400 Stacks  
ˆ The two network devices are operating in different duplex modes. The  
media converter performs best when its two network devices and its  
two ports all use the same duplex mode.  
ˆ There could be an intermittent problem with one of the network devices  
connected to the media converter or with a cable. To determine  
whether this might be the problem, set the unit to the Link Test mode  
and observe the Link LEDs of the ports. If one of the Link LEDs  
periodically blinks, it could mean that the link is intermittent. See  
Problem 6 for suggestions on how to resolve this issue.  
Problem 6: The media converter is operating in the Link Test mode and  
the Link LED of a port is blinking.  
Solution: This could indicate that the link between the port and the  
network device is intermittent. There might be a problem with the cable or  
the network device connected to the port. Try connecting another network  
device with a different cable to the same port on the media converter. If the  
Link LED remains steady on, then the problem is indeed with the original  
cable or the network device.  
Problem 7: The media converter is operating in the Smart MissingLink  
mode and the Link LEDs for both ports are blinking.  
Solution: This could have several possible causes. This can occur when a  
port is connected to another media converter that also supports the Smart  
MissingLink mode, forming a chain of media converters. Media converters  
that support the Smart MissingLink mode will pass the loss of a link on a  
port to all the media converters in the chain. This can result in situations  
where the Link LEDs on both ports of a media converter are blinking,  
indicating that the source of the problem has its origins in another media  
converter in the chain. To identify the source of the problem, set the  
operating mode on all the media converters in the chain to Link Test and  
then examine the Link LEDs of the ports. The Link LED of the port that  
cannot establish a link to its network device will be off.  
Another possible cause is that a port is only able to form an intermittent  
link with its network device, perhaps because of a problem with the cable  
or the network device. To identify which port is having the problem, use the  
Link Test mode.  
Note  
If you need further assistance, please contact Allied Telesis  
Section II: Advanced Operations  
51  
 
Chapter 3: Troubleshooting  
52  
Section II: Advanced Operations  
 
Appendix A  
Technical Specifications  
Physical  
Dimensions:  
Weight:  
W x D x H  
15.5 cm x 13.1 cm x 4.0 cm  
(6.10 in x 5.16 in x 1.58 in)  
.748 Kg (1.65 lb.)  
Temperature  
Operating Temperature:  
Storage Temperature:  
Operating Humidity:  
Storage Humidity:  
0° C to 40° C (32° F to 104° F)  
-25° C to 70° C (-13° F to 158° F)  
5% to 90% noncondensing  
5% to 95% noncondensing  
Maximum Operating  
Altitude:  
3,048 m (10,000 ft)  
4,000 m (13,100 ft)  
Maximum Non-Operating  
Altitude:  
Electrical Rating  
AC Input Supply  
Requirements:  
100-240 VAC, 1.0 A maximum, 50/60 Hz  
25 Watts maximum  
AC Input Power:  
Power-over-Ethernet @  
10/100Base-TX Port:  
15.4 Watts Maximum  
53  
 
           
Chapter : Technical Specifications  
Agency Certifications  
RFI Emissions  
FCC Class B, EN55022 Class B,  
C-TICK, CE  
Immunity  
Electrical Safety  
Standard  
RoHS  
EN55024  
EN60950 (TUV), UL 60950 (CULUS  
IEEE 802.3, IEEE 802.3u  
RoHS/China RoHS compliant  
580,000 Hrs  
)
MTBF  
10/100Base-TX Port Pinouts  
Figure 17 illustrates the pin layout to an RJ-45 connector and port.  
8
8
1
1
Figure 1. RJ-45 Connector and Port Pin Layout  
Table 11 lists the RJ-45 pin signals when the twisted pair port is operating  
in the MDI configuration at 10 or 100 Mbps.  
Table 1. MDI Pin Signals (10/100Base-TX)  
Pin  
Signal  
1
2
3
6
TX+  
TX-  
RX+  
RX-  
54  
 
           
AT-PC232/POE Media Converter Installation Guide  
Table 12 lists the RJ-45 port pin signals when a twisted pair port is  
operating in the MDI-X configuration at 10 or 100 Mbps.  
Table 2. MDI-X Pin Signals (10/100Base-TX)  
Pin  
Signal  
1
2
3
6
RX+  
RX-  
TX+  
TX-  
100Base-FX Port Specifications  
Table 13 lists the operating specifications for fiber port (Port 1) .  
Table 3. 100Base-FX Port 1 Specifications  
Property  
Value  
General  
Maximum Distance  
Fiber Optic Cable  
2 km  
50/125 µm or 62.5/125 µm (core  
cladding) multimode fiber optic cable  
Transmitter Characteristics  
Wavelength  
1310 nm  
Min: -22.5 dBm  
Typical: -20.3 dBm  
Max: -14 dBm  
Output Power  
Receiver Characteristics  
Wavelength  
1310 nm  
Min: -31.8 dBm  
Input Power  
Typical: -34.5 dBm  
Max (Saturation): -14 dBm  
Max Power / Link Budget  
9.3 dB (62.5/125 µm cabling)  
12.8 dB (50/125 µm cabling)  
Fiber Optic  
Typical Loss Factor  
1.00 dB (62.5/125 µm cabling)  
1.00 dB (50/125 µm cabling)  
Connector Type  
Duplex SC  
55  
 
           
Chapter : Technical Specifications  
56  
 
Appendix B  
Cleaning Fiber Optic Connectors  
The fiber optic connector consists of a fiber optic plug and its adapter. The  
end of the fiber optic cable is held in the core of the ferrule in the plug.  
Light signals are transmitted through the core of the fiber. Even minor  
smudges or dirt on the end face of the fiber, completely invisible to the  
naked eye, can disrupt light transmission and lead to failure of the  
component or of the entire system. Therefore, it is of utmost importance to  
clean all fiber optic connectors before use.  
Figure 18 shows the ferrule in an SC connector.  
177  
Ferrule  
Figure 18. Ferrule in an SC Connector Plug  
Figure 19 shows part of the end face of an unclean and clean ferrule.  
156  
Unclean  
Clean  
Figure 19. Unclean and Clean Ferrule  
This appendix provides the following procedures  
57  
 
       
Appendix B: Cleaning Fiber Optic Connectors  
Using a Cartridge-Type Cleaner  
Fiber optic cartridge cleaners are available from many vendors and are  
typically called “cartridge cleaners,” as shown in Figure 20.  
g
D i r e c t i o n  
T W A i P p i n E  
A
Figure 20. Cartridge Cleaner  
Note  
Do not use compressed air or aerosol air to clean a fiber optic  
connector.  
Warning: Do not stare into the laser beam. L2  
To clean a fiber optic connector using a cartridge cleaner, perform the  
following procedure.  
1. With one hand, hold the cartridge cleaner and push the lever on the  
cleaning cartridge in the direction of the arrow to expose the cleaning  
surface, as shown in Figure 21 on page 59.  
58  
 
   
AT-LX44000 Multi-Protocol WDM Transport System Installation Guide  
2. Place the ferrule tip on the exposed cleaning surface and rub the  
ferrule in a downward direction, as shown in Figure 21.  
102  
Figure 21. Rubbing the Ferrule Tip on the Cleaning Surface  
Note  
Rub the ferrule tip on the cleaning surface in one direction only.  
3. When you reach the end of the cleaning surface, pick up the ferrule tip,  
rotate and place it at the top and rub downwards at least 2 times.  
Caution  
Failing to pick up the ferrule tip when you reach the bottom of the  
cleaning surface can result in static electricity that can damage the  
fiber optic cable.  
4. If desired, repeat steps 3 and 4.  
5. If a fiber inspection scope is available, use the scope to inspect the  
ferrule end face to make sure that it is clean.  
6. Reconnect the cable to the port or protect the ferrule tip with a dust  
cap.  
Note  
Always keep a dust cap on a fiber optic cable when it is not in use.  
Note  
Do not touch the end face of the ferrule in the connector.  
59  
 
 
Appendix B: Cleaning Fiber Optic Connectors  
Using a Swab  
Specially treated swabs (stick cleaners) are available for cleaning inside  
connector adapters or hard-to-reach ferrule tips. These swabs, often  
referred to as “lint free” or “alcohol free” swabs, are available from many  
vendors, as shown in Figure 22. Stick cleaners are available in both 2.5  
mm and 1.25 mm sizes for use on SC and MU connectors respectively.  
Note  
NEVER use a household cotton swab and/or alcohol to clean a fiber  
optic connector. This may leave a residue on the ferrule tip.  
Figure 22. Lint-Free and Alcohol-Free Swabs  
Note  
Do not use compressed air or aerosol air to clean a fiber optic  
connector.  
Warning: Do not stare into the laser beam. L2  
60  
 
   
AT-LX44000 Multi-Protocol WDM Transport System Installation Guide  
To clean a recessed ferrule using a swab, perform the following  
procedure.  
1. Insert the swab into the adapter as shown in Figure 23 and rub the  
ferrule tip with the swab.  
157  
Figure 23. Cleaning a Recessed Ferrule  
2. If desired, repeat step 1.  
3. If a fiber inspection scope is available, use the scope to inspect the  
connector to make sure that it is clean and to check for scratches, pits,  
or other problems that may affect performance.  
Note  
Always keep a dust cap on a fiber optic cable when it is not in use.  
Note  
Do not touch the end face of the ferrule in the connector.  
61  
 
 
Appendix B: Cleaning Fiber Optic Connectors  
62  
 

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