KTI Networks TRI SEGMENT MEDIA KCD 302 User Manual

INDUSTRIAL  
Tri-segment Media Converter  
KCD-302 Series  
Installation Guide  
DOC.040913-KCD-302  
The information contained in this document is subject to change without  
prior notice. Copyright (C) All Rights Reserved.  
TRADEMARKS  
Ethernet is a registered trademark of Xerox Corp.  
FCC NOTICE  
This device complies with Class B Part 15 the FCC Rules. Operation is  
subject to the following two conditions: (1) This device may not cause  
harmful interference, and (2) this device must accept any interference  
received including the interference that may cause.  
CE NOTICE  
Marking by the symbol  
indicates compliance of this equipment to  
the EMC directive of the European Community. Such marking is indica-  
tive that this equipment meets or exceeds the following technical stan-  
dards:  
EMC Class B  
EN 50081-1/1992 : EN55022:1994/A1:1995/A2:1997 Class B  
EN61000-3-2:2000  
EN61000-3-3:1995/A1:2001  
EN 55024:1998/A1:2001  
IEC 61000-4-2:1995  
IEC 61000-4-3:1995  
IEC 61000-4-4:1995  
IEC 61000-4-5:1995  
IEC 61000-4-6:1996  
IEC 61000-4-8:1993  
IEC 61000-4-11:1994  
Table of Contents  
1. Introduction......................................................... 5  
1.1 Features ........................................................................................ 7  
1.2 Specifications ................................................................................ 8  
1.3 Model Specifications ................................................................... 13  
1.4 Special Functions ........................................................................ 14  
2. Installation ......................................................... 15  
2.1 Unpacking ................................................................................... 15  
2.2 DIN-Rail Mounting ....................................................................... 16  
2.3 Mounting on a Plane Surface ...................................................... 19  
2.4 Applying Power ............................................................................ 21  
2.5 Making TP Port Connection ......................................................... 23  
2.6 Making FX Port Connections ....................................................... 24  
3 Configuration Switches & LED Indicators ...... 26  
3.1 Configuration Switches ............................................................... 27  
3.1.1 TP Port Settings SW1-SW3 ...................................................... 27  
3.1.2 802.3x Function Setting SW4 ................................................... 27  
3.1.3 FX Port Duplex Settings SW5 SW6 .......................................... 28  
3.1.4 Factory Default Settings ........................................................... 28  
3.2 LED Indicators ............................................................................. 29  
1. Introduction  
The industrial tri-segment media converter series provides one 10/100BASE-  
TX Fast Ethernet port and two 100BASE-FX ports. It supports the connec-  
tions to three network segments, one UTP and two fiber cables. It serves the  
network data transfer between any two segments in switching basis. The  
following figure illustrates a basic connection example:  
The following figure illustrates another example which deploys multiple  
fiber cables to connect other Ethernet devices in a daisy-chain method.  
-5-  
For industrial environment, the converters are designed with the follow-  
ing enhanced features exceeding that of commercial media converters:  
! High and wide operating Temperature: -10oC to +55oC  
! Wide operating voltage range for DC power input: +7 ~ 30VDC  
! Power input interface: Screw terminal block and DC jack for adapter  
! DIN rail mounting support for industrial enclosure  
! Screw plane mounting support for industrial enclosure  
! Industrial-rated Emission and Immunity performance  
-6-  
1.1 Features  
Support network data transfer at full wire speed  
The TP port supports 10Mbps and 100Mbps connections  
Auto MDI/MDI-X detection function on the TP (copper) port  
Auto-negotiation function on the TP port  
Transparent conversion to 802.1Q VLAN tagged packets between  
any two segments  
Far End Fault function on FX (fiber) ports  
Support wide range of fiber options on the FX ports  
Low power consumption  
Two power interface type: screw terminal block and DC jack  
Wide operating voltage input range : +7 ~ 30VDC  
Support DIN rail mounting  
Support plane mounting  
High and wide operating temperature range : -10oC to +55oC  
-7-  
1.2 Specifications  
This figure shows the important components of the converter:  
-8-  
Twisted-Pair Interface (TP Port, or called copper Port)  
Connector  
Shielded RJ-45  
Pin Assignments  
Signal Compliance  
Data Speed  
Auto MDI/MDI-X detection  
IEEE802.310BASE-T,802.3u100BASE-TX  
10Mbps or 100Mbps  
Duplex Mode  
Configuration  
Half-duplex or Full-duplex  
Auto-negotiation capable and optional  
forced manual settings  
Cable Types  
10Mbps - Category 3, 4, or 5 UTP  
100Mbps - Category 5 UTP  
Supported Link Distance Up to 100 meters  
Fiber Optic Interfaces (FX1 Port, FX2 Port)  
Signal Compliance  
Connector  
Data Speed  
IEEE802.3u100BASE-FX  
SC, ST, or Single SC (model dependent)  
100Mbps  
Duplex Mode  
Cable Types  
Full-duplex and optional half duplex  
Multimode (MMF) - 50/125, 62.5/125 mm  
Singlemode(SMF)-9/125mm  
Supported Link Distance MMF up to 2km  
SMF, single SMF (model dependent)  
IEC825 Class 1  
Eye Safety compliance  
-9-  
ConfigurationSettingSwitches(SW)  
NO.  
FUNCTION  
SETTINGS  
SW1 TP Port mode  
SW2 TP Port Duplex  
SW3 TP Port Speed  
SW4 802.3x function  
SW5 FX1 port duplex  
SW6 FX2 port duplex  
OFF Auto-negotiation (default)  
ON  
OFF Full duplex (default)  
ON Half duplex  
OFF 100Mbps (default)  
ON 10Mbps  
OFF Enable (default)  
ON Disable  
OFF Full duplex mode (default)  
ON Half duplex mode  
OFF Full duplex mode (default)  
Forced mode  
ON  
Half duplex mode  
LEDIndicators  
LED  
DISPLAY  
STATE INTERPRETATION  
PWR  
Power status  
ON  
Power on  
OFF  
Power off  
TP LINK TP port link status ON  
OFF  
Link up and no traffic  
Link fault  
BLINK  
Rx/Tx activities  
100Mbps  
TP 100M TP port speed status ON  
OFF  
TP FDX TP port duplex status ON  
OFF  
10Mbps  
Full duplex  
Half duplex  
BLINK  
Collisions on half duplex  
Link up and no traffic  
Link fault  
FX1 LINK FX1 port link status ON  
OFF  
BLINK  
Rx/Tx activities  
Optical signal is detected  
No optical signal  
Link up and no traffic  
Link fault  
FX1 OL FX1 port optical link ON  
OFF  
FX2 LINK FX2 port link status ON  
OFF  
BLINK  
Rx/Tx activities  
Optical signal is detected  
No optical signal  
FX2 OL FX2 port optical link ON  
OFF  
-10-  
DC Power Input  
Interface  
Screw-type terminal block  
(2 sets for power wire cascading)  
DC Jack ( -D 6.3mm / + D 2.0mm)  
Operating Input Voltages +7V~+30V(+5%)  
Power consumption  
2.7W max. @7.5VDC input  
2.9W max. @24VDC input  
3.0W max. @+30VDC input  
Basic Information  
MAC Addresses Entries  
Forwarding Throughput  
1K  
Full wire speed at 100M full duplex  
10Mbps - 14,880 pps at 64-byte packets  
100Mbps - 148,800pps at 64-byte packets  
Forwarding Packet Types Transparent and no modification for  
- IEEE 802.3 standard packets  
- IEEE 802.1Q VLAN tagged packets  
Packet Length  
Flow Control  
Upto1536 bytes at store-and-forward mode  
Back-pressure for half-duplex mode  
802.3x pause-frame base for full duplex mode  
Supported on both FX ports  
Far End Fault Function  
Mechanical  
Dimension (base)  
Housing  
Mounting Support  
Weight  
W28mmxD82mmxH95mm  
Enclosed metal with no fan  
DIN-rail mounting, Plane mounting  
250g  
Environmental  
Operating Temperature  
Storage Temperature  
Relative Humidity  
Typical -10oC ~ 55oC (model dependent)  
-40oC ~ 85oC  
5% ~ 90%  
-11-  
Certificate  
FCC  
CE/EMC  
Part 15 Class B  
EMI EN50081-1 Class B  
EMSEN55024  
EN60950  
CE/LVD Safety  
EN 50081-1/1992 :  
EN55022:1994/A1:1995/A2:1997  
EN61000-3-2:2000  
EN61000-3-3:1995/A1:2001  
CISPR Class B  
Device <75W  
Clause 5  
EN 55024:1998/A1:2001  
IEC 61000-4-2:1995 ESD Test  
IEC 61000-4-3:1995 RS Test  
IEC 61000-4-4:1995 EFT/BURST Test  
IEC 61000-4-5:1995 Surge Test  
IEC 61000-4-6:1996 CS Test  
IEC 61000-4-8:1993 Magnetic Field  
IEC 61000-4-11:1994 Volatge Int. Dips  
-12-  
1.3 Model Specifications  
The media converter series provides the following fiber options:  
Model Specifications  
KCD-302-xxx  
Model Ext.  
-2T  
WaveL.  
FX Connectors (nm)  
Operating  
Temperature  
-10 ~ 55oC  
-10 ~ 55oC  
-10 ~ 55oC  
-10 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
Fiber Distance  
2 km  
2 km  
2 km  
2 km  
2 km  
2 km  
2 km  
2 km  
FX1 : ST MMF  
FX2 : ST MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
-2C  
-2CL1  
-2CL2  
-MCSC2  
-2SA2  
-2SL2  
2 km  
20 km  
15 km  
15 km  
20 km  
20 km  
Optical Specifications  
KCD-302-xxx  
WaveL. TX Power Rx Sens. Rx max.  
Model Ext.  
-2T  
FX Connectors (nm)  
(dBm)  
(dBm)  
(dBm)  
-14 min.  
-14 min.  
-14 min.  
-14 min.  
-8 min.  
-8 min.  
-3 min.  
-3 min.  
-3 min.  
-3 min.  
-7 min.  
-7 min.  
-3 min.  
-3 min.  
FX1 : ST MMF  
FX2 : ST MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
-19 ~ -14  
-19 ~ -14  
-19 ~ -14  
-19 ~ -14  
-19 ~ -12  
-19 ~ -12  
-19 ~ -14  
-19 ~ -14  
-19 ~ -14  
-18 ~ -7  
-15 ~ -8  
-15 ~ -8  
-18 ~ -7  
-18 ~ -7  
-34 max.  
-34 max.  
-34 max.  
-34 max.  
-31 max.  
-31 max.  
-34 max.  
-34 max.  
-34 max.  
-32 max.  
-31 max.  
-31 max.  
-32 max.  
-32 max.  
-2C  
-2CL1  
-2CL2  
-MCSC2  
-2SA2  
-2SL2  
WaveL. : Wavelength, Rx Sens. : Rx sensitivity, Rx max. : Maximum Rx power  
-13-  
1.4 Special Functions  
AutoMDI/MDI-XFunction  
This function allows the TP port to auto-detect the twisted-pair signals  
and adapts itself to form a valid MDI to MDI-X connection with the  
remote connected device automatically.  
Auto-negotiation Function  
When TP port is set on Auto-negotiation mode (SW1:ON), it is featured  
with auto-negotiation function and full capability. It performs a negotia-  
tion process for the speed and duplex configuration with the connected  
device automatically when each time a link is being established.  
Far End Fault Function  
The FX ports are facilitated with this function, which conforms to IEEE  
802.3u 100BASE-FX specifications. When the FX port detects a link  
failure on its receiving circuitry, it will send out an FEFI (Far End Fault  
Indication) signal to the remote connected device to indicate a remote  
fault is detected. It also is capable to receive FEFI signal sent from the  
remote link partner. Upon receiving an FEFI signal, it indicates a link  
failure occurred on the transmitting path. This function allows the con-  
verter to report a fiber link fault even when a link failure occurred on  
transmitting fiber cable.  
-14-  
2. Installation  
2.1 Unpacking  
Check that the following components have been included:  
Information CD  
The product unit  
DIN-rail mounting bracket  
If any item is found missing or damaged, please contact your local reseller  
for replacement.  
The following are available optional accessories:  
Plane Mounting Bracket  
The bracket is used for mounting the converter on a plane surface.  
Commercial-rated AC power adapters:  
Rated AC120V/60Hz DC7.5V 1A  
Rated AC230V/50Hz DC7.5V 1A  
Rated AC100V/50-60Hz DC7.5V 1A  
Rated AC240V/50Hz DC7.5V 1A  
The adapters are used for supplying DC power to the converter  
via DC power jack interface.  
-15-  
2.2 DIN-Rail Mounting  
In the product package, a DIN-rail bracket is provided for mounting the  
converter in a industrial DIN-rail enclosure.  
The steps to mount the device onto a DIN-rail are:  
1. Clamp the bracket into the rear of the device. Align the bracket with  
the rear face of the device and screw it onto the device unit.  
-16-  
2. Unscrew and loose the mounting clamp plate of the bracket. Mount  
the bracket with the device onto the DIN rail.  
5. Screw the clamp with the bracket and make sure the device is  
properly fixed on the DIN rail.  
-17-  
Make sure that there are proper heat dissipation from and adequate ven-  
tilation around the device.  
The final mechanical dimensions after installing DIN rail mounting bracket  
are:  
-18-  
2.3 Mounting on a Plane Surface  
An optional mounting bracket, as shown below is also available for mount-  
ing the device on a plane surface such as a wall, a wood board, or a metal  
plate in an industrial enclosure.  
To mount the device on a plane surface, the steps are:  
1. Clamp the bracket into the device and align the bracket with the  
bottom surface of the device and screw it on the converter firmly as  
shown below:  
-19-  
2. Mount and screw the device on the target surface. The final  
dimension after bracket installation is also shown below:  
Make sure that there are proper heat dissipation from and adequate ven-  
tilation around the device. Do not place heavy objects on the device.  
-20-  
2.4 Applying Power  
The product provide two types of power interfaces, terminal block and DC  
power jack for receiving DC power input from external power supply.  
DC Power Input Specification  
Operating Voltage  
+7~+30VDC  
Power Consumption  
Max. 3.0W@30VDC  
DC Power Terminal Block  
Connectors  
Screw-type Terminal block (2 sets)  
Pin Assignments  
DC1+ - Positive (+) Negative (-) terminals  
DC2+ - 2nd Positive (+) Negative (-) terminals  
24~12AWG(IEC0.5~2.5mm2)  
Power wires  
The steps to install power wires to the terminal block are:  
1. Loose the terminal screw to open the contact for power wire  
insertion. Insert power wire into the contact.  
2. Screw the terminal and make sure power wire is fixed securely.  
-21-  
DC2 + and DC2 - can be installed with another power-pair for delivering the  
main power input to next converter in a cascading way.  
Note: Only up to four device units can be cascaded to receive power  
from one main power input source.  
DC Power Jack  
Connector:  
Jack D 6.3mm  
D 2.0mm  
AC Power Adapters: Optional commercial rated adapters are available  
for purchasing.  
Rated AC120V/60Hz DC7.5V 1A  
Rated AC230V/50Hz DC7.5V 1A  
Rated AC100V/50-60Hz DC7.5V 1A  
Rated AC240V/50Hz DC7.5V 1A  
Steps to apply the power to the device are:  
1. Connect power adapter DC plug to the DC power jack of the  
converter before connecting to the AC outlet.  
2. Connect the power adapter to the AC outlet.  
Note: Before you begin the installation, check the AC voltage of your  
area. The AC power adapter which is used to supply the DC power  
for the unit should have the AC voltage matching the commercial  
power voltage in your area.  
-22-  
2.5 Making TP Port Connection  
TP port is featured to support connection to :  
Auto-negotiation devices  
Auto-negotiation incapable 10BASE-T devices  
Auto-negotiation incapable 100BASE-TX devices  
Network Cables  
10BASE-T:  
100BASE-TX:  
Link distance:  
2-pair UTP Cat. 3,4,5 , EIA/TIA-568B 100-ohm STP  
2-pair UTP Cat. 5, EIA/TIA-568B 100-ohm STP  
Up to 100 meters  
Note: The TP port is featured with auto MDI/MDI-X crossover  
detection and configuration function. No matter a straight  
through cable or crossover cable is connected, the TP port can  
sense the receiving pair automatically and configure itself to  
match the rule for MDI to MDI-X connection.  
Configuration Setup  
To make a proper connection to different devices, the following configu-  
ration settings are recommended:  
Link partner of TP port  
SW1  
SW2  
SW3  
Auto-negotiation device  
Off: auto  
Off: full duplex  
On: half duplex  
On: half duplex  
Off: full duplex  
Off: full duplex  
Off: 100M  
On: 10M  
Off: 100M  
On: 10M  
Off: 100M  
Fixed 10M half duplex device On: forced  
Fixed 100M half duplex device On: forced  
Fixed 10M full duplex device On: forced  
Fixed 100M full duplex device On: forced  
-23-  
2.6 Making FX Port Connections  
FX1 port and FX2 port operate on 100Mbps and full duplex (factory  
default).  
A variety of fiber options is provided as follows:  
Model Specifications  
KCD-302-xxx  
Model Ext.  
-2T  
WaveL.  
FX Connectors (nm)  
Operating  
Temperature  
-10 ~ 55oC  
-10 ~ 55oC  
-10 ~ 55oC  
-10 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
-20 ~ 55oC  
Fiber Distance  
2 km  
2 km  
2 km  
2 km  
2 km  
2 km  
2 km  
2 km  
FX1 : ST MMF  
FX2 : ST MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
-2C  
-2CL1  
-2CL2  
-MCSC2  
-2SA2  
-2SL2  
2 km  
20 km  
15 km  
15 km  
20 km  
20 km  
-24-  
Optical Specifications  
KCD-302-xxx  
WaveL. TX Power Rx Sens. Rx max.  
Model Ext.  
-2T  
FX Connectors (nm)  
(dBm)  
(dBm)  
(dBm)  
-14 min.  
-14 min.  
-14 min.  
-14 min.  
-8 min.  
-8 min.  
-3 min.  
-3 min.  
-3 min.  
-3 min.  
-7 min.  
-7 min.  
-3 min.  
-3 min.  
FX1 : ST MMF  
FX2 : ST MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC MMF  
FX1 : SC MMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
FX1 : SC SMF  
FX2 : SC SMF  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
1310  
-19 ~ -14  
-19 ~ -14  
-19 ~ -14  
-19 ~ -14  
-19 ~ -12  
-19 ~ -12  
-19 ~ -14  
-19 ~ -14  
-19 ~ -14  
-18 ~ -7  
-15 ~ -8  
-15 ~ -8  
-18 ~ -7  
-18 ~ -7  
-34 max.  
-34 max.  
-34 max.  
-34 max.  
-31 max.  
-31 max.  
-34 max.  
-34 max.  
-34 max.  
-32 max.  
-31 max.  
-31 max.  
-32 max.  
-32 max.  
-2C  
-2CL1  
-2CL2  
-MCSC2  
-2SA2  
-2SL2  
WaveL. : Wavelength, Rx Sens. : Rx sensitivity, Rx max. : Maximum Rx power  
Network Cables  
Multimode (MMF) - 50/125, 62.5/125 mm  
Singlemode(SMF)-9/125mm  
-25-  
3 Configuration Switches & LED Indicators  
The following figure shows the locations of the configuration switches  
and LED indicators:  
Refer to the following sections for the related functions.  
-26-  
3.1 Configuration Switches  
SW FUNCTION  
SETTING&STATE  
SW1 TPPortmode  
OFF Auto-negotiation(default)  
ON Forcedmode  
SW2 TPPortDuplex  
SW3 TP Port Speed  
SW4 802.3x function  
SW5 FX1 port duplex  
SW6 FX2 port duplex  
OFF Fullduplex(default)  
ON Halfduplex  
OFF 100Mbps(default)  
ON 10Mbps  
OFF Enable(default)  
ON Disable  
OFF Full duplex mode (default)  
ON Half duplex mode  
OFF Full duplex mode (default)  
ON Half duplex mode  
3.1.1 TP Port Settings SW1-SW3  
SW1, SW2, SW3 are used for configuring the TP port especially when  
connecting to a link partner port which is not auto-negotiation capable.  
Refer to section 2.5 for details.  
3.1.2 802.3x Function Setting SW4  
IEEE 802.3x function is the flow control method used for full duplex op-  
eration on the TP port and FX ports under store and forward mode. This  
method uses pause frames for one port to stop further transmission from  
its link partner.  
-27-  
3.1.3 FX Port Duplex Settings SW5 SW6  
This settings are used to set the duplex mode of the FX1 port and FX2  
port individually. It is recommended to use full duplex mode for FX con-  
nection unless its link partner is a fixed half duplex device. Half duplex  
mode will shorten the connection distance. The following table lists the  
maximum MMF cable length connecting to different devices:  
Link Partner of FX Port  
Distance (MMF cable)  
Network card half-duplex fiber port  
Network card full-duplex fiber port  
Class I hub half-duplex fiber port  
2 Class II hub half-duplex fiber port  
Switched half-duplex fiber port  
Switched half-duplex fiber port  
400m  
2km  
160m  
112m  
400m  
2km  
Note: For SMF connection, be sure the link partner is a full duplex  
device and set SW5 SW6 to full duplex mode for the FX ports.  
3.1.4 Factory Default Settings  
The factory default settings are as follows:  
SW1 OFF TP port mode - auto-negotiation  
SW2 OFF TP port - full duplex  
SW3 OFF TP port - 100Mbps  
SW4 OFF Enable IEEE 802.3x flow control function  
SW5 OFF FX1 port - full duplex  
SW6 OFF FX2 port - full duplex  
-28-  
3.2 LED Indicators  
LED  
PWR  
DISPLAY  
Power status  
STATUS & INTERPRETATION  
ON Power on  
OFF Power off  
TP  
LINK  
TP port link status  
ON  
Link up and no traffic  
OFF Link fault  
Blink Rx/Tx activities  
100M  
FDX  
TP port speed status  
ON  
OFF 10Mbps  
TP port duplex status ON Full duplex  
100Mbps  
OFF Half duplex  
Blink Collisions on half duplex  
FX1  
LINK  
FX1 port link status  
FX1 port optical link  
FX2 port link status  
FX2 port optical link  
ON  
Link up and no traffic  
OFF Link fault  
Blink Rx/Tx activities  
ON  
OL  
Optical signal is detected  
OFF No optical signal is detected  
FX2  
LINK  
ON  
Link up and no traffic  
OFF Link fault  
Blink Rx/Tx activities  
ON  
OL  
Optical signal is detected  
OFF No optical signal is detected  
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