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AT-PC2002/POE
User Manual
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Allied Telesis AT-PC2002/POE User Manual

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Fast and Gigabit Ethernet Media Converter
AT-PC2002/POE
◆
Installation Guide
613-001049 Rev. A
Copyright © 2009 Allied Telesis, Inc.
Allied Telesis and the Allied Telesis logo are trademarks of Allied Telesis, Incorporated. All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks of their respective owners.
Allied Telesis, Inc. reserves the right to make changes in specifications and other information contained in this document without prior written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesis, Inc. be liable for any incidental, special, indirect, or consequential damages whatsoever, including but not limited to lost profits, arising out of or related to this manual or the information contained herein, even if Allied Telesis, Inc. has been advised of, known, or should have known, the possibility of such damages.
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-PC2002/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 www.alliedtelesis.com and on this product CD.
4

Contents

Preface ............................................................................................................................................................ 11
Where to Find Web-based Guides ................................................................................................................... 12
Contacting Allied Telesis .................................................................................................................................. 13
Online Support ........................................................................................................................................... 13
Email and Telephone Support.................................................................................................................... 13
Returning Products .................................................................................................................................... 13
Sales and Corporate Information ............................................................................................................... 13
Warranty..................................................................................................................................................... 13
Management Software Updates................................................................................................................. 13
Chapter 1: Overview ...................................................................................................................................... 15
Introduction....................................................................................................................................................... 16
10/100/1000Base-T Twisted Pair Port.............................................................................................................. 18
Type of Connector...................................................................................................................................... 18
Port Speed ................................................................................................................................................. 18
Duplex Mode .............................................................................................................................................. 18
Maximum Distance..................................................................................................................................... 18
Type of Cabling .......................................................................................................................................... 19
Auto
MDI/MDI-X........................................................................................................................................................ 19
SFP Module Slot............................................................................................................................................... 20
Operating Modes .............................................................................................................................................. 21
Link Test Mode........................................................................................................................................... 21
MissingLink Mode ...................................................................................................................................... 21
Smart MissingLink Mode............................................................................................................................ 22
Setting the Operating Mode ....................................................................................................................... 23
Power over Ethernet......................................................................................................................................... 24
Implementation........................................................................................................................................... 25
LEDs................................................................................................................................................................. 26
Power LED ................................................................................................................................................. 26
10/100/1000Base-T Twisted Pair Port LEDs ............................................................................................. 27
SFP Module Slot LEDs .............................................................................................................................. 28
Operating Mode LEDs................................................................................................................................ 28
Link LEDs and the Operating Modes................................................................................................................ 29
Link Test Mode........................................................................................................................................... 29
MissingLink Mode ...................................................................................................................................... 29
Smart MissingLink Mode............................................................................................................................ 30
DIP Switches .................................................................................................................................................... 32
Network Topologies.......................................................................................................................................... 33
Chapter 2: Installation ................................................................................................................................... 37
Reviewing the Safety Guidelines...................................................................................................................... 38
Verifying the Package Contents ....................................................................................................................... 41
Selecting a Location ......................................................................................................................................... 43
Configuring the DIP Switches........................................................................................................................... 44
Installing the Feet ............................................................................................................................................. 45
5
Contents
Installing the Media Converter on a Wall .......................................................................................................... 46
Installing the SFP Module .................................................................................................................................47
Cabling the Ports .............................................................................................................................................. 49
Installing the Power Cord Retaining Clip .......................................................................................................... 50
Powering On the Media Converter.................................................................................................................... 51
Verifying the Installation.................................................................................................................................... 53
Chapter 3: Troubleshooting .......................................................................................................................... 55
Appendix A: Technical Specifications .........................................................................................................59
Physical............................................................................................................................................................. 59
Temperature ..................................................................................................................................................... 59
Electrical Specifications .................................................................................................................................... 59
Agency Certifications ........................................................................................................................................ 60
10/100/1000Base-T Port Pinouts ...................................................................................................................... 60
Appendix B: Cleaning Fiber Optic Connectors ........................................................................................... 63
Using a Cartridge-Type Cleaner .......................................................................................................................64
Using a Swab.................................................................................................................................................... 66
6

Figures

Figure 1: AT-PC2002/POEE Media Converter .....................................................................................................................16
Figure 2: LEDs on the AT-PC2002/POE Media Converter...................................................................................................26
Figure 3: Topology 1.............................................................................................................................................................33
Figure 4: Topology 2.............................................................................................................................................................34
Figure 5: Topology 3.............................................................................................................................................................35
Figure 6: Attaching the Rubber Feet for Table or Desktop Installation.................................................................................45
Figure 7: Positioning the Media Converter on the Wall Screws............................................................................................46
Figure 8: Installing the SFP Module......................................................................................................................................47
Figure 9: Positioning the SFP Handle...................................................................................................................................48
Figure 10: Inserting the AC Power Cord Retaining Clip .......................................................................................................50
Figure 11: Power Cord Retaining Clip in the Upright Position ..............................................................................................51
Figure 12: Connecting the AC Power Cord ..........................................................................................................................51
Figure 13: Securing the Power Cord with the Retaining Clip................................................................................................52
Figure 14: RJ-45 Connector and Port Pin Layout.................................................................................................................60
Figure 15: Ferrule in an SC Connector Plug.........................................................................................................................63
Figure 16: Unclean and Clean Ferrule..................................................................................................................................63
Figure 17: Cartridge Cleaner ................................................................................................................................................64
Figure 18: Rubbing the Ferrule Tip on the Cleaning Surface ...............................................................................................65
Figure 19: Lint-Free and Alcohol-Free Swabs......................................................................................................................66
Figure 20: Cleaning a Recessed Ferrule..............................................................................................................................66
7
Figures
8

Tables

Table 1: Twisted Pair Cabling and Distances ......................................................................................................................19
Table 2: IEEE 802.3af Class vs. Power Levels ...................................................................................................................25
Table 3: System Status LED ...............................................................................................................................................26
Table 4: 10/100/1000Base-T Twisted Pair Port LEDs .........................................................................................................27
Table 5: SFP Transceiver Slot LEDs ...................................................................................................................................28
Table 6: Operating Mode LEDs ...........................................................................................................................................28
Table 7: Link LEDs in the Link Test Mode ...........................................................................................................................29
Table 8: “L” Link LEDs in the MissingLink Mode .................................................................................................................30
Table 9: “L” Link LEDs in the Smart MissingLink Mode .......................................................................................................30
Table 10: Components in the Shipping Container ...............................................................................................................41
Table 11: DIP Switch Settings .............................................................................................................................................44
Table 12: MDI Pin Signals (10 or 100 Mbps) .......................................................................................................................60
Table 13: MDI-X Pin Signals (10 or 100 Mbps) ...................................................................................................................61
Table 14: Pin Signals - 1000 Mbps ......................................................................................................................................61
9
Tables
10

Preface

This guide contains the installation instructions for the AT-PC2002/POE Gigabit Ethernet Media Converter. In this guide you’ll learn about the features of the product and how to install the unit.
This preface contains the following sections:
“Where to Find Web-based Guides” on page 12
“Contacting Allied Telesis” on page 13
11
Preface

Where to Find Web-based Guides

The installation and user guides for all of the Allied Telesis products are available for viewing in portable document format (PDF) from our web site at www.alliedtelesis.com.
12
AT-PC2002/POE Media Converter Installation Guide

Contacting Allied Telesis

This section provides Allied Telesis contact information for technical support and for sales and corporate information.

Online Support You can request technical support online from the Allied Telesis

Knowledge Base at www.alliedtelesis.com/support/kb.aspx. You can submit questions to our technical support staff from the Knowledge Base and review answers to previously asked questions.
Email and Telephone
Support
Returning
Products
Sales and
Corporate
Information

Warranty The AT-PC2002/POE Media Converter has a Five Year Warranty. All

Management
Software Updates
For Technical Support via email or telephone, refer to the Allied Telesis web site at www.alliedtelesis.com. Select your country from the list on the web site and then select the appropriate tab.
Products for return or repair must be assigned Return Materials Authorization (RMA) numbers. A product sent to Allied Telesis without an RMA number will be returned to the sender at the sender’s expense.
To obtain an RMA number, contact the Allied Telesis Technical Support group at www.alliedtelesis.com/support/rma.aspx.
You can contact Allied Telesis for sales or corporate information at our web site at www.alliedtelesis.com.
Allied Telesis warranties are subject to the terms and conditions set out in the Allied Telesis Limited Warranties on our web site at www.alliedtelesis.com/warranty.
New releases of the management software for our managed products are available from the following Internet sites:
Allied Telesis web site: www.alliedtelesis.com
Allied Telesis FTP server: ftp://ftp.alliedtelesis.com
If the FTP server prompts you to log on, enter “anonymous” as the user name and your email address as the password.
The AT-PC2002/POE Media Converter is not a managed product.
13
Preface
14

Chapter 1

Overview

The AT-PC2002/POE Media Converter is a simple and reliable way to connect Fast or Gigabit Ethernet devices across large geographical distances with fiber optic cable. The unit has one 10/100/1000Base-T twisted pair port for a local connection and one slot for a fiber optic 100Base-FX or 1000Base-X SFP module. The product features Power over Ethernet (PoE) on the twisted pair port for support of a Powered Device (PD), such as a wireless access point or a Voice over Internet Protocol (VoIP) telephone.
This unmanaged product is suitable for the central office or a remote site and can be installed on a table or a wall. LEDs on the front panel display the general status of the unit and the ports, and DIP switches on the back panel let you configure the port settings.
The product features low latency to minimize the impact on network performance along with cyclic redundancy check (CRC) detection to prevent the propagation of incomplete or fragmented packets on your network.
This chapter has these sections:
❒ “Introduction” on page 16
❒ “10/100/1000Base-T Twisted Pair Port” on page 18
❒ “SFP Module Slot” on page 20
❒ “Operating Modes” on page 21
❒ “Power over Ethernet” on page 24
❒ “LEDs” on page 26
❒ “Link LEDs and the Operating Modes” on page 29
❒ “DIP Switches” on page 32
❒ “Network Topologies” on page 33
15
Chapter 1: Overview

Introduction

Figure 1 illustrates the front and back panels of the media converter.
AT-PC2002/POE
Gigabit PoE Bridging Converter
AUTO
NEG
OFF ON
LINK
ACT
1000
SPEED (Mbps)
2
100
10 100
1 2 3 4
22 1
PORT
DUPLEX
MODE
HALF FULL
CLASS 1
LASER PRODUCT
100Base-FX 1000Base-X
100Base-FX 1000Base-X
SFP
LINK
ML
SML
LT
MODE
SFP
10/100/1000Base-T
Auto MDI/MDI-X
ACT 10 100
1000
100-240VAC~
Figure 1. AT-PC2002/POEE Media Converter
The AT-PC2002/POE Media Converter has the features listed here:
❒ One 10/100/1000Base-T twisted pair port featuring:
PWR PoE ANeg FDX
1426
1427
16
– IEEE 802.3u Auto-Negotiation
– IEEE 802.3af Power over Ethernet (PoE) with 15.4 W
of power for a powered device
– Half- or full-duplex mode
– Auto-MDI/MDI-X
– RJ-45 connector
– Back pressure in half-duplex mode at 10 or 100 Mbps
– IEEE 802.3x flow control in full-duplex mode at 10,
100, or 1000 Mbps
❒ One slot for a 100Base-FX or 1000Base-X SFP module
❒ Jumbo Ethernet frames of up to 9,000 bytes in the payload
❒ DIP switches for configuring the ports
AT-PC2002/POE Media Converter Installation Guide
❒ Link Test, MissingLink
❒ LEDs for unit and port status
❒ MAC address table with a storage capacity of 4,000 addresses
❒ Back-to-back and standalone topologies
❒ Transparent to IEEE802.1Q packets
❒ Desktop or wall-mount installation
❒ Internal AC power supply
™
and Smart MissingLink operating modes
17
Chapter 1: Overview

10/100/1000Base-T Twisted Pair Port

The 10/100/1000Base-T twisted pair port is described below:
Type of
Connector
The twisted pair port has an 8-pin RJ-45 connector. The port uses four pins when operating at 10 or 100 Mbps and all eight pins when operating at 1000 Mbps. For the port pinout details, refer to “10/100/1000Base-T Port Pinouts” on page 60.

Port Speed The twisted pair port can operate at 10, 100, or 1000 Mbps. IEEE 802.3u-

compliant, the unit can set the speed of the port automatically with Auto­Negotiation or you can set the speed manually with the DIP switches on the back panel.
Note
The twisted pair port has to be set to Auto-Negotiation to operate at 1000 Mbps.

Duplex Mode The port can operate in either half- or full-duplex mode. If Auto-Negotiation

is activated on the port, the duplex mode is set automatically. If Auto­Negotiation is disabled, you set the duplex mode manually using the DIP switches.
Note
In order for the media converter to successfully Auto-Negotiate the duplex mode of the twisted pair port 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, 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.
18
Maximum
Distance
The 10/100/1000Base-T twisted pair port has a maximum operating distance of 100 meters (328 feet).
AT-PC2002/POE Media Converter Installation Guide

Type of Cabling Table 1 lists the cable specifications for the twisted pair port.

Table 1. Twisted Pair Cabling and Distances
Speed Cable Type
Maximum Operating
Distance
Auto
MDI/MDI-X
10 Mbps Standard TIA/EIA 568-B-compliant
Category 3 or better shielded or unshielded cabling with 100 ohm impedance and a frequency of 16 MHz.
100 Mbps Standard TIA/EIA 568-A-compliant
Category 5 or TIA/EIA 568-B­compliant Enhanced Category 5 (Cat 5e) shielded or unshielded cabling with 100 ohm impedance and a frequency of 100 MHz.
1000 Mbps Standard TIA/EIA 568-A-compliant
Category 5 or TIA/EIA 568-B­compliant Enhanced Category 5 (Cat 5e) shielded or unshielded cabling with 100 ohm impedance and a frequency of 100 MHz.
The wiring configuration of the twisted pair port is set automatically with auto-MDI/MDI-X. Consequently, you can use a straight-through twisted pair cable to connect any type of Ethernet network device to the port. The auto-MDI/MDI-X feature is always active, even when the Auto- Negotiation feature is turned off and the speed and duplex mode on the port are set manually.
100 m (328 ft)
100 m (328 ft)
100 m (328 ft)
19
Chapter 1: Overview

SFP Module Slot

The SFP slot can support one 100Base-FX or 1000Base-X SFP module. For the list of supported modules, contact your Allied Telesis sales representative.
20
AT-PC2002/POE Media Converter Installation Guide

Operating Modes

The AT-PC2002/POE Media Converter supports these operating modes:
“Link Test Mode,” next
“MissingLink Mode” on page 21
“Smart MissingLink Mode” on page 22

Link Test Mode Contrary to its name, the Link Test operating mode is not a diagnostic

utility. Rather, this mode simply reflects the states of the links on the ports on the LinK LEDs. When the media converter is operating in this mode, a port’s Link LED will be on when the port has 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
Mode
The MissingLink 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 establish a link with its network device or loses the link, the 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 other port so that the two port can again forward traffic to each other.
This operating mode is intended to take advantage of the fact 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 switches, one local and the other remote. Switch 1, the remote switch, is
21
Chapter 1: Overview
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.
Smart
MissingLink
Mode
This operating mode is mainly used 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 to troubleshoot a network problem that may have its roots with a link problem. This is because 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 mode or the Smart MissingLink mode would be more useful when troubleshooting a link problem.
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 status of their connections. This mode is different in that it does not completely shut off the transmitter of a port when the other port on the unit 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 other port on the media converter.
22
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
AT-PC2002/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
Operating Mode
You set the operating mode with the Mode button on the front panel of the unit. Setting the mode does not interrupt the flow of network traffic through the device. To set the operating mode, use a pointed object such as a pen to depress the Mode button.
23
Chapter 1: Overview

Power over Ethernet

The twisted pair port on the AT-PC2002/POE Media Converter features Power over Ethernet (PoE), which is a mechanism for supplying power to a network device over the same twisted pair cable that is used to carry the network traffic.
A device that receives its power over an Ethernet cable is called a powered device (PD). Examples include wireless access points, voice over Internet Protocol (VoIP) telephones, web cams, and unmanaged Ethernet switches.
One of the advantages of PoE is that the AT-PC2002/POE Media Converter acts as the power source for the powered device. If you add an uninterruptible power source (UPS) to the media converter, you protect both the media converter and the powered device from possible power source problems, thereby increasing the reliability of your network.
PoE can also simplify network installation. A frequent issue often encountered when selecting a location for a network device is whether there is a power source nearby. This often limits equipment placement or requires the added time and cost of installing additional electrical sources. But with PoE, you can install PoE-compatible network equipment wherever needed.
The media converter automatically determines whether or not a device connected to the twisted pair 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-PC2002/POE Media Converter can supply up to 15.4 watts of power to a powered device, while at the same time furnishing standard 10/100/1000 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 available on the port but no power is delivered to the device.
The AT-PC2002/POE Media Converter smart power management functionality supports the IEEE 802.3af powered device classes listed in Table 2.
24
AT-PC2002/POE Media Converter Installation Guide
Table 2. IEEE 802.3af Class vs. Power Levels
Class Usage
Minimum Power
Levels Output at
the PSE
Maximum Power Levels Output at
the PD
0 Default 15.4W 0.44W to 12.95W
1 Optional 4.0W 0.44W to 3.84W
2 Optional 7.0W 3.84W to 6.49W
3 Optional 15.4W 6.49W to 12.95W

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-PC2002/POE Media Converter uses Alternative A, where power is transmitted over strands 1, 2, 3, and 6.
Powered devices 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-PC2002/POE Media Converter should also work with most legacy powered devices as long as the devices can be powered on pins 1, 2, 3, and 6.
25
Chapter 1: Overview

LEDs

The LEDs on the AT-PC2002/POE, Media Converter are shown in Figure 2 and described in the following sections:
❒ “Power LED” on page 26
❒ “10/100/1000Base-T Twisted Pair Port LEDs” on page 27
❒ “SFP Module Slot LEDs” on page 28
❒ “Operating Mode LEDs” on page 28
Operating Mode
Button

Power LED

AT-PC2002/POE
Gigabit PoE Bridging Converter
SFP Module
LINK
ACT
100
1000
LEDs
CLASS 1
LASER PRODUCT
100Base-FX 1000Base-X
SFP
Mode LEDs
ML
SML
LT
MODE
Operating
Figure 2. LEDs on the AT-PC2002/POE Media Converter
Power LED The states of the PWR LED are described in Table 3.
Table 3. System Status LED
LED Color Description
PWR Green The unit is receiving power.
Off The unit is not receiving power.
10/100/1000Base-T
Auto MDI/MDI-X
Twister Pair
LINK
PWR
ACT
PoE
10
ANeg
100
FDX
1000
1426
Port LEDs
26
AT-PC2002/POE Media Converter Installation Guide
10/100/1000Base-
T Twisted Pair
Port LEDs
The LEDs for the 10/100/1000Base-T twisted pair port are described in Table 4.
Table 4. 10/100/1000Base-T Twisted Pair Port LEDs
LED Color Description
LINK Green The port has established a link to a
network device.
Blinking Green The media converter is operating in the
Smart MissingLink mode and there is no connection on the port on the SFP module.
Off The port has not established a link to a
network device.
ACT Blinking Green The port is transmitting and/or receiving
network packets.
Off The port is not transmitting and/or
receiving network packets.
10 100
10 -Green The port is operating at 10 Mbps.
100 - Off
10 - Off The port is operating at 100 Mbps.
100 - Green
10 - Green The port is operating at 1 Gbps.
100 - Green
PoE Green The twisted pair port is connected to a
powered device and is providing power to the device.
Off The twisted pair port is not supplying
power to the network device connected to the port.
ANeg Green The port is using Auto-Negotiation to
control its speed and duplex mode.
Off The speed and duplex mode on the port
are set manually.
For additional information on the Link LED, refer to “Link LEDs and the Operating Modes” on page 29.
27
Chapter 1: Overview
SFP Module Slot
LEDs
The LEDs for the SFP module slot are described in Table 5.
Table 5. SFP Transceiver Slot LEDs
LED Color Description
LINK Green The port on the SFP transceiver has established
a link to a network device.
Blinking Green
Off The port has not established a link with a network
ACT Blinking
Green
Off The port is not transmitting and/or receiving
100 Green The port is operating at 100 Mbps.
1000 Green The port is operating at 1 Gbps.
The media converter is operating in the Smart MissingLink mode and there is no connection on the twisted pair port.
device.
The port is transmitting and/or receiving network packets.
network packets.
Operating Mode
LEDs
For additional information on the Link LED, refer to “Link LEDs and the Operating Modes” on page 29.
The three LEDs to the right of the Mode button display the media converter’s operating mode and are defined in Table 6.
Table 6. Operating Mode LEDs
LED Color Description
ML Green The media converter is in the MissingLink
mode.
SML Green The media converter is in the Smart
MissingLink mode.
LT Green The media converter is in the Link Test
mode.
28
AT-PC2002/POE Media Converter Installation Guide

Link LEDs and the Operating Modes

The basic function of the Link LEDs is to report the states of the links of the ports. However, the meanings of the LEDs vary slightly depending on the operating mode of the unit. The following sections describe the states and meanings of the LEDs under the different operating modes.

Link Test Mode When a media converter is set to the Link Test mode, the Link LEDs for

the two ports report the current states of the connections between the ports and the local and remote network devices. As described in Table 7, a Link LED will be on when a port has a link to its network device and it will be off when a port does not have a link.
Table 7. Link LEDs in the Link Test Mode
MissingLink
Mode
Ports
Twisted Pair Port
Fiber Optic Port Off
Twisted Pair Port
Fiber Optic Port Steady Green
Twisted Pair Port
Fiber Optic Port Off
Twisted Pair Port
Fiber Optic Port Steady Green
When the media converter is set to the MissingLink mode, the two ports pass their “Link” status to each other so that a change in the link status on one port is replicated on the other port. A port is not allowed to establish a link to its network device unless the other port can also establish a link with its device. For more information on this operating mode, refer to “MissingLink Mode” on page 21.
Link LED
States
Off Neither of the ports has
established a link to a network device.
Steady Green Both of the ports have established
links to their network devices.
Steady Green The twisted pair port has
established a link to its network device, but the fiber optic port has not established a link.
Off The fiber optic port has established
a link to a network device, but the twisted pair port has not established a link.
Description
The Link LEDs of the two ports in this mode always work in tandem. They are either both on or off. Table 8 lists the combinations and definitions of the Link LEDs for the twisted pair port and fiber optic port operating in this mode.
29
Chapter 1: Overview
Table 8. “L” Link LEDs in the MissingLink Mode
Smart
MissingLink
Mode
Channel Ports
Twisted Pair Port
Fiber Optic Port Off
Twisted Pair Port
Fiber Optic Port Steady Green
The Smart MissingLink mode pulses the transmitter on a port when its companion port in a channel loses or has not established a link to its network device. The blinking Link LED can make it easier for you to identify and troubleshoot a link problem on the two ports of a channel. For more information on this operating mode, refer to “Smart MissingLink Mode” on page 22.
Table 9 lists the combinations and definitions of the Link LEDs for the twisted pair port and fiber optic port of a channel operating in this mode.
Table 9. “L” Link LEDs in the Smart MissingLink Mode
Link LED
States
Off One or both of the ports can not
establish a link with a network device.
Steady Green Both of the ports have established
links with their network devices.
Description
Channel Ports
Twisted Pair Port
Fiber Optic Port Off
Twisted Pair Port
Fiber Optic Port Steady Green
Twisted Pair Port
Fiber Optic Port Off
Twisted Pair Port
Fiber Optic Port Flashing Green
Link LED
States
Off Neither port in the channel has
Steady Green Both ports have established links
Flashing Green The twisted pair port can establish
Off The fiber optic port of a channel
Description
established a link with a network device.
to their network devices.
a link to its network device, but the fiber optic port is unable to establish a link to its remote device.
can establish a link with its network device, but the twisted pair port is unable to establish a link with its local device.
30
AT-PC2002/POE Media Converter Installation Guide
Table 9. “L” Link LEDs in the Smart MissingLink Mode (Continued)
Channel Ports
Twisted Pair
Link LED
States
Flashing Green Both ports can establish links to
Port
Fiber Optic Port Flashing Green
Description
their network devices, but one of the ports is connected to another media converter that also supports the Smart MissingLink feature, forming a chain of converters. A link has been lost on one of the ports in the chain, causing a ripple affect through the chain of converters. Alternatively, one of the ports is only able to form an intermittent link with its network device.
31
Chapter 1: Overview

DIP Switches

The DIP switches on the back panel are used to configure the operating characteristics of the 10/100/1000Base-T twisted-pair port (Port 2), such as the port speed, duplex mode, and Auto-Negotiation. There is also a DIP switch for specifying the type of SFP module in the SFP slot. For the DIP switch settings, refer to Table 11 on page 44.
32

Network Topologies

This section illustrates several topologies that incorporate the media converter. The network in the first example consists of a central office with the AT-9424Ts Gigabit Ethernet Switch and four remote sites that have powered devices: a security camera, two AT-WA7400 Wireless Access Points, and a VoIP telephone. Deployed at the remote sites are AT-PC2002/POE Media Converters. They are powering the powered devices over the twisted pair cables and are providing network connectivity to the AT-9424Ts Gigabit Ethernet Switch at the central office.
AT-PC2002/POE Media Converter Installation Guide
Central Office:
AT-9424Ts Gigabit Ethernet Switch
with SFP Modules
1441
AT-PC2002/POE
Gigabit PoE Bridging Converter
Remote Site 1:
Camera
Legend
Fiber optic cable
Twisted pair cable
AT-PC2002/POE
Gigabit PoE Bridging Converter
RESET TO DEFAULT
5V,2.8A
LAN
Remote Site 2:
AT-WA7400
Wireless Access
Point
AT-PC2002/POE
Gigabit PoE Bridging Converter
RESET TO DEFAULT
5V,2.8A
LAN
Remote Site 3:
AT-WA7400
Wireless Access
Point
Figure 3. Topology 1
AT-PC2002/POE
Gigabit PoE Bridging Converter
Remote Site 4:
VoIP Phone
33
Chapter 1: Overview
As illustrated in the next topology, the media converter can also be deployed at a central office if the remote devices have fiber optic ports. In the example, the media converters are connected to the AT-9424Ts Gigabit Ethernet Switch at the central office with twisted pair cable and to the remote devices, in this case AT-GS950/16 Gigabit Switches that have SFP transceivers, over fiber optic cables. Since the AT-9424Ts Gigabit Ethernet Switch is not a powered device, the PoE feature on the media converters is not used.
Central Office:
AT-9424Ts Gigabit Ethernet Switch and
AT-PC2002/POE Media Converters
1442
AT-PC2002/POE
Gigabit PoE Bridging Converter
AT-GS950/16 AT-GS950/16 AT-GS950/16 AT-GS950/16
AT-PC2002/POE
Gigabit PoE Bridging Converter
AT-PC2002/POE
Gigabit PoE Bridging Converter
Remote Sites:
AT-GS950/16 Gigabit Ethernet
Switches with SFP Modules
Legend
Fiber optic cable
Twisted pair cable
Figure 4. Topology 2
AT-PC2002/POE
Gigabit PoE Bridging Converter
34
AT-PC2002/POE Media Converter Installation Guide
The next example illustrates a topology that is commonly referred to as a back-to-back topology. Here, media converters are deployed at both the central office and the remote sites. Each pair of converters transfers network traffic from twisted pair cable to fiber optic cable and back again to twisted pair cable. Furthermore, the media converters at the remote sites that have powered devices provide Power over Ethernet.
Central Office:
AT-9424Ts Gigabit Ethernet Switch and
AT-PC2002/POE Media Converters
1443
AT-PC2002/POE
Gigabit PoE Bridging Converter
AT-PC2002/POE
Gigabit PoE Bridging Converter
Legend
AT-PC2002/POE
Gigabit PoE Bridging Converter
AT-PC2002/POE
Gigabit PoE Bridging Converter
AT-PC2002/POE
Gigabit PoE Bridging Converter
AT-PC2002/POE
Gigabit PoE Bridging Converter
RESET TO DEFAULT
5V,2.8A
Remote Sites with
AT-PC2002/POE Media Converters
AT-PC2002/POE
Gigabit PoE Bridging Converter
AT-PC2002/POE
Gigabit PoE Bridging Converter
LAN
Fiber optic cable
Twisted pair cable
Figure 5. Topology 3
35
Chapter 1: Overview
36

Chapter 2

Installation

The sections in this chapter contain the installation instructions for the AT-PC2002/POE Media Converter:
❒ “Reviewing the Safety Guidelines” on page 38
❒ “Verifying the Package Contents” on page 41
❒ “Selecting a Location” on page 43
❒ “Configuring the DIP Switches” on page 44
❒ “Installing the Feet” on page 45
❒ “Installing the Media Converter on a Wall” on page 46
❒ “Installing the SFP Module” on page 47
❒ “Cabling the Ports” on page 49
❒ “Installing the Power Cord Retaining Clip” on page 50
❒ “Powering On the Media Converter” on page 51
❒ “Verifying the Installation” on page 53
37
Chapter 2: Installation

Reviewing the Safety Guidelines

Please review the following safety guidelines before you begin to install the AT-PC2002/POE Media Converter.
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 www.alliedtelesis.com. This document is also included with the documentation CD that is shipped with the product.
Note
Refer to the documentation that comes with the SFP module to determine whether the module is a Class 1 LED product or a Class 1 Laser product.
Warning: Class 1 Laser product.
Warning: Do not stare into the laser beam.
Warning: Class 1 LED product.
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
L1
L3
L2
38
AT-PC2002/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.
Warning: Do not work on equipment or cables during periods of lightning activity.
Warning: Power cord is used as a disconnection device. To de­energize equipment, disconnect the power cord.
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.
Pluggable Equipment. The socket outlet shall be installed near the equipment and shall be easily accessible.
E1
E2
E5
E3
E4
Caution: Air vents must not be blocked and must have free access to the room ambient air for cooling.
E6
39
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
Warning: Only trained and qualified personnel are allowed to
install or to replace this equipment.
E14
Caution: Do not install in direct sunlight, or a damp or dusty place.
E16
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 port 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-PC2002/POE Ethernet Media Converter 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.
Caution: During normal operations, the SFP module may have a case temperature that exceeds 70° C (158° F). If you remove the module, exercise caution when handling with unprotected hands.
40

Verifying the Package Contents

Unpack the unit and verify that all of the items listed in Table 10 are included in the shipping container. If an item is missing or damaged, contact your Allied Telesis sales representative for assistance.
Note
You should retain the original packaging material so that you’ll have it available if you ever need to return the unit to Allied Telesis.
Table 10. Components in the Shipping Container
Component Description
AT-PC2002/POE
Gigabit PoE Bridging Converter
LINK ACT
100
1000
LASER PRODUCT
CLASS 1
100Base-FX 1000Base-X
AT-PC2002/POE Media Converter Installation Guide
One AT-PC2002/POE Media Converter
LINK
SFP
ML
SML
LT
MODE
10/100/1000Base-T
Auto MDI/MDI-X
PWR
ACT
PoE
10
ANeg
100
FDX
1000
1426
Four rubber feet for table or desktop installation
1437
Two wall anchors
1438
Two wall-mount screws
1439
One regional AC power cord
1412
41
Chapter 2: Installation
Table 10. Components in the Shipping Container
Component Description
One power cord retaining clip
1411
One documentation CD
1405
42

Selecting a Location

Here are the guidelines for choosing a location for the media converter:
❒ The power outlet should be located near the unit and be easily
❒ The site should provide easy access to the ports on the front of the
❒ Air flow around the unit and through the side and rear vents should be
❒ Do not place objects on top of the chassis.
❒ Do not expose the device to moisture or water.
❒ Make sure that the site is in a dust-free environment.
❒ Use dedicated power circuits or power conditioners to supply reliable
AT-PC2002/POE Media Converter Installation Guide
accessible.
chassis so that you can easily connect and disconnect the network cables, as well as view the unit’s LEDs.
unrestricted.
electrical power to the network devices
❒ If you are installing the chassis on a table, be sure the table is level
and secure.
❒ Keep the media converter chassis and the twisted pair cable away
from sources of electrical noise, such as radios, electric motors, transmitters, broadband amplifiers, power lines, and fluorescent fixtures.
43
Chapter 2: Installation

Configuring the DIP Switches

To configure the DIP switches on the back panel, refer to Table 11.
Table 11. DIP Switch Settings
DIP
Switch
1 Twisted pair port Auto-
Port Function Position Description
Off Auto-negotiation is disabled on the
Negotiation
twisted pair port.
On Auto-negotiation is activated on the
port.
2 Twisted pair port Speed
(Mbps)
10 The speed of the twisted pair port is
set to 10 Mbps.
100 The speed of the port is set to 100
Mbps.
3 Twisted pair port Duplex
mode
Half The duplex mode of the twisted pair
port is set to half-duplex mode.
Full The duplex mode of the port is set to
full-duplex mode.
4 SFP module Module type 100Base-FX The SFP module is 100Base-FX.
1000Base-X The SFP module is 1000Base-X.
Here are several guidelines to setting the DIP switches:
44
❒ The twisted pair port has to be set to Auto-Negotiation to operate at
1000 Mbps.
❒ Setting DIP switch 1 to On to activate Auto-Negotiation disables DIP
switches 2 and 3.
❒ To manually configure the speed and duplex mode of the twisted pair
port with DIP switches 2 and 3, you have to disable Auto-Negotiation with DIP switch 1.
❒ The setting of DIP switch 4 must match the type of SFP module the
unit contains. If this DIP switch is set incorrectly. the port on the SFP module will not establish a link with the remote network device.
❒ You can change the DIP switches even when the unit is powered on. A
change to a DIP switch setting is immediately implemented by the unit.
❒ The wiring configuration of the twisted pair port is always set with
Auto-MDI/MDI-X, even when Auto-Negotiation is disabled. You cannot manually set the port’s wiring configuration.

Installing the Feet

AT-PC2002/POE Media Converter Installation Guide
If you are installing the AT-PC2002/POE Media Converter on a table or a desktop, perform this procedure to install the rubber feet on the bottom of the unit:
1. Turn the media converter over and place it on a secure surface.
2. Attach the four rubber feet included with the unit to the corners of the bottom of the media converter.
1000Base-X 100Base-FX
SFP
CLASS 1
LASER PRODUCT
1000
100
ACT
LINK
1436
FDX ANeg PoE PWR
1000
100 10
ACT LINK
Auto MDI/MDI-X
10/100/1000Base-T
LT
ML
SML
MODE
Figure 6. Attaching the Rubber Feet for Table or Desktop Installation
Gigabit PoE Bridging Converter
AT-PC2002/POE
45
Chapter 2: Installation

Installing the Media Converter on a Wall

To wall-mount the media converter:
1. Select a wall location for the unit.
2. Install the two wall anchors included with the bracket into the wall so that they are level with each other and are spaced 64 mm (2.52 in) apart.
3. Install the two Phillips flat-head screws into the wall anchors. The screws should protrude from the wall approximately 5 mm (0.2 in.).
Note
Depending on the location you have chosen for the unit, you may find it convenient to skip the next step, which mounts the unit on the screws, and instead assemble the unit on a table first before mounting it on the wall.
4. Place the two keyholes in the unit over the two wall screws and slide the bracket down to secure the bracket on the screws.
L
C
A
L
S
A
E
S
R
S
P
1
R
O D
U
C
T
100Bas
1000Ba
e-FX
se-X
1364
Figure 7. Positioning the Media Converter on the Wall Screws
46

Installing the SFP Module

-
X
To install the SFP module:
1. Remove the SFP module from its shipping container and store the packaging material in a safe location.
Caution
The SFP module is sensitive to and can be damaged by electrostatic discharge. Wear a grounding device and observe electrostatic discharge precautions when installing the module in the device.
2. With the label on the module facing up, slide the module into the slot until it clicks into place.
AT-PC2002/POE Media Converter Installation Guide
verter
CLASS 1
LASER PRODUC
LINK
1000
ACT
100
T
SFP
100Base-FX 1000Base-X
MODE
Figure 8. Installing the SFP Module
3. Verify that its handle is in the upright position.
SML
M
LT
L
10/100/1000Base
Auto MDI/MDI-
1434
47
Chapter 2: Installation
-
X
Transceiver
Handle
verter
CLASS 1
LASER
PRO
DUC
LINK
ACT
100
1000
T
SFP
100Base-FX 1000Base-X
MODE
SML
ML
LT
10/100/1000Base
Auto MDI/MDI-
1435
Figure 9. Positioning the SFP Handle
Note
To protect the transceiver from dust contamination, do not remove its dust cap until you are ready to connect the fiber optic cable.
For the optical and cabling specifications for the SFP modules, consult the SFP documentation.
48

Cabling the Ports

AT-PC2002/POE Media Converter Installation Guide
Here are the guidelines for connecting a network cable to the twisted pair port:
❒ The RJ-45 connector should fit snugly into the port on the module and
the tab on the connector should lock the connector into place.
❒ The default setting for a twisted pair port is Auto-Negotiation and auto-
MDI/MDI-X.
Here are the guidelines for connecting the fiber optic cable to the SFP module:
❒ Do not remove the dust cover from the fiber optic port until you are
ready to connect the cable. Dust contamination can adversely affect the operation of the port. For directions on how to clean a fiber optic port, refer to Chapter B, “Cleaning Fiber Optic Connectors” on page
63.
❒ The connector on the fiber optic cable should firmly lock into place on
the port.
❒ You should verify that the fiber optic ports on the SFP module and the
remote device are compatible and that you are using the correct type of fiber optic cable.
49
Chapter 2: Installation

Installing the Power Cord Retaining Clip

To install the power cord retaining clip, position the clip as shown in Figure 10 and press the sides of the clip toward the center. Then insert the short ends into the holes in the retaining bracket.
A
U
T
O
S
N
P
E
E
G
E
D
(M
D
bp
U
P
s
L
OFF
)
E
X
M
O
ON
D
E
10 100
HALF
SF
P
FULL
100Base-FX 1000Base-X
1
2
3
4
2
22 1
PO
R
T
100-240VAC
~
1430
A
U
T
O
S
N
P
E
E
G
E
D
(M
D
bp
U
P
s
L
OFF
)
E
X
M
O
ON
D
E
10 100
HALF
S
F
P
FULL
100Base-FX 1000Base-X
1
2
3
4
2
22 1
PO
RT
100-240VAC
~
1431
Figure 10. Inserting the AC Power Cord Retaining Clip
50

Powering On the Media Converter

To power on the AT-PC2002/POE Media Converter:
1. Position the power cord retaining clip in the upright position.
A
U
T
O
S
N
E
G
(M
OFF ON
AT-PC2002/POE Media Converter Installation Guide
P
E
E
D
D
bp
U
PL
s
)
E
X
M
O
D
E
10 100
H
S
ALF
FP
FULL
100Base-FX 1000Base-X
1
2
3
4
2
22 1
PO
RT
100-240VAC
~
1428
Figure 11. Power Cord Retaining Clip in the Upright Position
2. Plug the power cord into the AC power connector.
Warning: Power cord is used as a disconnection device. To de­energize equipment, disconnect the power cord.
.
A
U
T
O
S
N
P
E
E
G
E
D
(M
D
b
U
p
P
s
L
OFF
)
E
X
M
O
ON
D
E
10 100
HALF
S
FP
FULL
100B
as
e-FX
1000Base-X
1
2
3
4
2
22 1
PO
RT
100-240VAC
~
1429
E3
Figure 12. Connecting the AC Power Cord
51
Chapter 2: Installation
3. Lower the power cord retaining clip to secure the cord to the AT-PC2002/POE Media Converter.
AUT
O
N
S
P
EG
EE
D
(M
D
b
U
ps
PL
OFF
)
E
X
M
O
ON
DE
10 100
H
S
AL
F
P
F
FUL
100Ba
L
se-FX
1000Ba
se-X
1
2
3
4
2
2
2
1
PO
RT
100-240VAC
~
1440
Figure 13. 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 “Electrical Specifications” on page 59.
The AT-PC2002/POE Media Converter is now ready for network operations.
52

Verifying the Installation

This procedure is used to verify the installation of the media converter. It explains how to determine whether or not the fiber optic port on the SFP module and the twisted pair port have established links to their network devices. This procedure assumes the following:
❒ The media converter is powered on.
❒ The network cables are connected to the ports on the media converter
and to the local and remote devices.
❒ The local and remote network devices are powered on.
To verify the installation of the media converter:
1. Place the media converter in the Link Test operating mode by pressing the Mode button until the LT LED is on.
2. Observe the Link LEDs for the twisted pair port and the fiber optic port on the media converter.
AT-PC2002/POE Media Converter Installation Guide
❒ If the Link LEDs for both of the ports are on, the ports have
established links with their network devices and may already be forwarding network traffic. You can either leave the unit in the Link Test mode or, by pressing the Mode button again, change it to the MissingLink mode or the 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.
❒ 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.
53
Chapter 2: Installation
54

Chapter 3

Troubleshooting

Here are suggestions on how to troubleshoot the AT-PC2002/POE Media Converter.
Problem 1: The PWR LED is off.
Solutions: The media converter is not receiving power or the power
supply in the unit has failed. Try the following:
❒ Verify that the power cord is firmly connected to the media converter
and to the power source.
❒ Verify that the power source is operating properly by plugging a
different device into it.
❒ Verify that the power from the power source meets the operating
specifications of the media converter, listed in “Electrical Specifications” on page 59.
Problem 2: The Link LED for the twisted pair port is off.
Solutions: Set the unit to the Link Test mode. If the Link LED for the
twisted pair port remains off, try the following:
❒ 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.
❒ Verify that the network device connected to the twisted pair port is
powered on and is operating properly.
❒ 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.
❒ Verify that you are using the correct type of cable and have not
exceeded the maximum distance. For the cable specifications, refer to “Type of Cabling” on page 19.
❒ Verify the settings of DIP switches 1, 2 and 3. For information, refer to
Table 11 on page 44.
Problem 3: The Link LED for the fiber optic port is off.
Solutions: Set the unit to the Link Test mode. If the Link LED for the fiber
optic port remains off, try the following:
❒ Verify that the SFP module is firmly seated in the SFP slot.
55
Chapter 3: Troubleshooting
❒ 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.
❒ Verify that the network device connected to the fiber optic port is
powered on and is operating properly.
❒ Verify that the operating specifications of the fiber optic ports on the
SFP module and on the remote network device are compatible. The operating specifications for the SFP module can be found in the module’s instructions.
❒ Check that DIP switch 4 is set correctly for the SFP module.
❒ Verify that the correct type of fiber optic cabling is being used and that
the maximum operating distance has not been exceeded.
❒ Try connecting another network device to the fiber optic port using a
different cable. If the port is able to establish a link, then the problem is with the cable or the other network device.
❒ If the remote network device is a managed device, use its
management firmware to verify that the fiber optic port is enabled.
❒ Test the attenuation on the fiber optic cable with a fiber optic tester to
determine whether the optical signal is too weak or too strong. The specifications of the fiber optic port on the SFP module can be found in the module’s instructions.
Problem 4: One of the Link LEDs is blinking and the other Link LED is off.
Solutions: The unit is in the Smart MissingLink mode and the port whose
Link LED is off is unable to form a link to its network device. Change the unit to the Link Test mode and go to Problem 2 for the twisted pair port or to Problem 3 for the fiber optic port for suggestions on how to resolve the problem.
Problem 5: The Link LEDs for the two ports are on but the network devices are not forwarding traffic to each other through the media converter.
Solutions: Try the following:
❒ If the network devices are managed devices, use their management
firmware to determine whether they are configured and operating properly.
❒ If one of the network devices is a switch that is using a spanning tree
protocol, use its management firmware to determine the state of the port that is connected to the media converter. The port may have been placed in the blocking mode by the switch if it was determined to be part of a redundant path.
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AT-PC2002/POE Media Converter Installation Guide
Problem 6: Two network devices are forwarding traffic through the media converter, but performance is slow.
Solutions: Try the following:
❒ 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.
❒ 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 2 or 3 for suggestions on how to resolve this issue.
Problem 7: The media converter is operating in the Link Test mode and the Link LED of one of the ports is blinking.
Solutions: This could be an indication of an intermittent link between the port and the network device. There could be a problem with the cable or the network device connected to the port. See Problem 2 or 3 for suggestions on how to resolve this issue.
Problem 8: The media converter is operating in the Smart MissingLink mode and the Link LEDs for both ports are blinking.
Solutions: 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 modes on all of 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 possibility is an intermittent link on one of the ports, 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 Technical Support. Refer to “Contacting Allied Telesis” on page 13.
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Chapter 3: Troubleshooting
58

Appendix A

Technical Specifications

Physical

Dimensions: W x D x H
Weight: 0.77 Kg (1.7 lb.)

Temperature

15.5 cm x 13.1 cm x 4.0 cm (6.10 in x 5.16 in x 1.58 in)
Operating Temperature: 0° C to 40° C (32° F to 104° F)
Storage Temperature: -25° C to 70° C (-13° F to 158° F)
Operating Humidity: 5% to 90% noncondensing
Storage Humidity: 5% to 95% noncondensing
Maximum Operating Altitude: 3,048 m (10,000 ft)
Maximum Non-Operating Altitude: 4,000 m (13,100 ft)

Electrical Specifications

AC Input Supply Requirements: 100-240 VAC, 1.0 A maximum, 50/60 Hz
AC Input Power: 30 Watts maximum
Power-over-Ethernet on the Twisted Pair Port: 15.4 Watts Maximum
59
Appendix A: Technical Specifications

Agency Certifications

RFI Emissions FCC Class B, EN55022 Class B,
Immunity EN55024
C-TICK, CE
Electrical Safety EN60950 (TUV), UL 60950 (
Standard IEEE 802.3, IEEE 802.3u
RoHS RoHS/China RoHS compliant
MTBF 550,000 Hrs

10/100/1000Base-T Port Pinouts

Figure 14 illustrates the pin layout to an RJ-45 connector and port.
Figure 14. RJ-45 Connector and Port Pin Layout
CULUS
Pin 1Pin 8
)
60
Table 12 lists the RJ-45 pin signals when the twisted pair port is operating in the MDI configuration at 10 or 100 Mbps.
Table 12. MDI Pin Signals (10 or 100 Mbps)
Pin Signal
1TX+
2TX-
3RX+
6RX-
AT-PC2002/POE Media Converter Installation Guide
Table 13 lists the RJ-45 port pin signals when the port is operating in the MDI-X configuration at 10 or 100 Mbps.
Table 13. MDI-X Pin Signals (10 or 100 Mbps)
Pin Signal
1RX+
2RX-
3TX+
6TX-
Table 14 lists the pin signals when the twisted pair port is operating at 1000 Mbps.
Table 14. Pin Signals - 1000 Mbps
Pinout Pair
1 Pair 1 +
2 Pair 1 -
3 Pair 2 +
4 Pair 3 +
5 Pair 3 -
6 Pair 2 -
7 Pair 4 +
8 Pair 4 -
61
Appendix A: Technical Specifications
62

Appendix B

Cleaning Fiber Optic Connectors

A 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 15 shows the ferrule in an SC connector.
177
Ferrule
Figure 15. Ferrule in an SC Connector Plug
Figure 16 shows part of the end face of an unclean and clean ferrule.
156
Unclean Clean
Figure 16. Unclean and Clean Ferrule
This appendix provides the following procedures
❒ “Using a Cartridge-Type Cleaner” on page 64
❒ “Using a Swab” on page 66
63
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 17.
PUSH OPENPUSH OPEN
Direction
Wiping
TAPE A
100
Figure 17. 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 18 on page 65.
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AT-PC2002/POE Media Converter Installation Guide
2. Place the ferrule tip on the exposed cleaning surface and rub the ferrule in a downward direction, as shown in Figure 18.
102
Figure 18. 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.
65
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 19. 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 19. 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
To clean a recessed ferrule using a swab, perform the following procedure.
1. Insert the swab into the adapter as shown in Figure 20 and rub the ferrule tip with the swab.
157
66
Figure 20. Cleaning a Recessed Ferrule
AT-PC2002/POE Media Converter Installation Guide
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.
67
Appendix B: Cleaning Fiber Optic Connectors
68
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