Pelco FX82052 manual Table D. Troubleshooting with Rear-Panel Indicators

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Table D. Troubleshooting with Rear-Panel Indicators (Continued)

Indicator Color	Meaning	Possible Cause	Corrective Action

RJ-45 10BASE-T/100BASE-TX Port Status LED - Right (Duplex/Collision) (Continued)

Not lit

Port is set to 10BASE-T half- duplex mode and no collisions are detected.*

—

If 10BASE-T half-duplex operation is desired, no action is required. If 10BASE-T half- duplex operation is not desired, refer to Setting 10BASE-T/100BASE-TX Port Modes of Operation on page 14 for information.

*A collision is a normal event on a half-duplex Ethernet link. A collision occurs when two or more devices, referred to as stations, attempt to transmit at the same time on a shared physical medium.

Ethernet uses the CSMA/CD (Carrier Sense Multiple Access/Collision Detect) media access method by which two or more stations share a common transmission medium. Using CSMA/CD, a station monitors the medium and transmits a message in bit-serial form when it senses that no other station is transmitting. If, after initiating a transmission, the message collides with that of another station, each transmitting station then intentionally transmits for an additional predefined period to ensure propagation of the collision throughout the system. To avoid another collision, each station waits a random amount of time (backoff) before attempting to transmit again.

Excessive collisions occur when retransmission of a frame fails after 16 consecutive times and the frame is dropped. Excessive collisions may indicate that the network is becoming congested.

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Contents Ethernet Switch Contents List of IllustrationsTX Mode Switch Settings FX Mode Switch Settings List of TablesImportant Safety Instructions Risk of Electric Shock Do not Open Regulatory Notices Radio and Television InterferenceProduct Overview DescriptionPOINT-TO-POINT Application with Fiber Redundancy C2607M 2/07 Single-Mode Models† ModelsFX82052, -2 Models Multimode Models FX82052, -4 Models Multimode ModelsFront Panel Power LED Pelco badge100BASE-FX Status LED Per fiber port a and B 10BASE-T/100BASE-TX Ports 1-5,RJ-45 connectors Rear Panel10BASE-T/100BASE-TX Ports 1-5 RJ-45 connectors FX82052 Rear PANEL, -4 ModelsInstallation Package ContentsAutonegotiation is enabled by default Flow control is disabled by defaultFlow control default setting Setting Fiber Failover ModeTable A. TX Mode Switch Settings 10BASE-T/100BASE-TX Modes of OperationDefault setting Table B. FX Mode Switch SettingsMode of Operation Secondary fiber linkMounting Mounting the FX82052 Module Into a RackMounting the FX82052 Module Using the Wall Clip FX82052 Connections, -4 Models SC Fiber Connectors Shown Connections10BASE-T/100BASE-TX connections Fiber connectionsFiber Link FX Mode Position Fiber Ports a and B Are Independent FX Mode Position FX Mode Position Fiber Ports a and B Are Independent Module Reseat module or power Supply as necessary TroubleshootingCheck power connection Replace power supplyMeaning Replace local module Indication Fefi On local module Optical signalOptic Fault LED on local Section in this table By the remote linkMeaning Possible Cause Corrective Action Optic Fault LED Amber Table D. Troubleshooting with Rear-Panel IndicatorsDesired, refer to Setting If 10BASE-T operation isMeaning Possible Cause Corrective Action Refer to Setting Duplex modeDuplex mode Duplex link If half-duplex mode isFull-duplex operation is not Mode refer to SettingGreen Port is set to If 100BASE-TX full-duplex Flashing green Port is set to Normal or excessiveTable D. Troubleshooting with Rear-Panel Indicators Optic Fault optic signal/laser status per fiber port SpecificationsLink/activity and speed, duplex/collision and speed Single-Mode 9/125 μm FX82052, -2 Models Wavelength Optical MaximumMultimode 62.5/125 μm FX82052SSTR-2Fibers Appendix. RJ-45 Connector Pinouts Illustrates RJ-45 MDI/MDI-X connector pinoutsProduct Warranty and Return Information ISO9001