Cisco Systems 7600 manual LX/LH Gbic and MMF Cable Considerations, Patch Cord

Page 64

Appendix B Cable and Connector Specifications

LX/LH GBIC and MMF Cable Considerations

LX/LH GBIC and MMF Cable Considerations

The following sections describe the things you should consider if you are using a Supervisor Engine 2 with a long wavelength/long haul (LX/LH) GBIC with 62.5-micron diameter MMF cable.

Patch Cord

When using the long wavelength/long haul (LX/LH) GBIC with 62.5-micron diameter MMF on links that span more than 984 feet (300 meters), a mode-conditioning patch cord is required. You must install the patch cord (Cisco product number CAB-GELX-625 or equivalent) between the GBIC and the MMF cable on both the transmit and receive ends of the link.

Note We also recommend using a patch cord between the LX/LH GBIC and MMF cable for very short link distances (10 to 100 meters). Without a patch cord, the link can have an elevated bit error rate (BER).

Note The patch cord is required to comply with IEEE standards. The IEEE found that link distances could not be met with certain types of fiber-optic cable due to a problem in the center of some fiber-optic cable cores. The solution is to launch light from the laser at a precise offset from the center by using the mode-conditioning patch cord. At the output end of the patch cord, the LX/LH GBIC complies with the IEEE 802.3z standard for 1000BASE-LX.

Patch Cord Configuration Example

Figure B-8shows a typical patch cord configuration.

Figure B-8 Patch Cord Configuration

Patch

cord

Rx

1000BASE-LX/LH port

Tx

	Building	Patch
	cable plant	cord
		Tx
Patch	Patch	1000BASE-LX/LH
panel	panel	port
		Rx
Link span greater than 984 ft
	(300 m)

13088

	Cisco 7600 Series Router Supervisor Engine and Route Switch Processor Guide
B-16	OL-10100-04

Image 64

Contents Americas Headquarters Text Part Number OL-10100-04Copyright 2007-2008 Cisco Systems, Inc. All rights reserved N T E N T S Safety Precautions for Module Installation and Removal Cleaning the Fiber-Optic Connectors B-15 OL-10100-04 Contents Document HistoryDocument Organization Document ConventionsChapter Title Description Convention DescriptionRelated Documentation OL-10100-04 Cisco 7600 Product Overview Cisco 7600 Series RoutersSupported Hardware Features Feature DescriptionFeature Description Port Addresses Physical Interface AddressesMAC Addresses FAN StatusRoute Switch Processors Supervisor Engines Overview Product Number Description Product Number RSP720-3CXL-GEWS-SUP720-3BXL WS-SUP32-GE-3BRoute Switch Processor WS-X6K-S2-MSFC2WS-X6K-S2U-MSFC2 WS-X6K-S2-PFC2Unsupported Hardware and Features RSP720 FeaturesSupported Chassis, Line Cards, and Modules RSP720-10GE Features RSP720 with 10GE Uplink PortsUnsupported Features Unsupported Chassis and ModulesRSP720-10GE Usage Guidelines and Limitations QoS on the RSP720-10GEQoS Configuration Guidelines Supervisor Engine 720 and Supervisor Engine Front-Panel Controls RSP720, RSP720-10GE, Sup720, Sup32Component Description Front-Panel LEDs RSP720, RSP720-10GE, Sup720, Sup32Color Description Supervisor Engine Supervisor Engine 2 Front PanelSection on page 3-10 for more information Off when you insert a card Preparing for Installation or Removal Safety Precautions for Module Installation and Removal Preventing Electrostatic Discharge DamageDetermining Module Location Tools Required for Module InstallationModule Slot Assignments Installing a Supervisor Engine or Route Switch Processor ModuleEjector Levers and Captive Installation Screws See Figure Removing a Supervisor Engine or Route Switch Processor Hot Swapping OIR Modules Removing and Replacing MemoryConnecting to the Console Port Connecting a TerminalConnecting a Modem Connecting to the Uplink PortsSupervisor Engine Module Uplink Ports Using Flash Memory Cards Locating the Flash PC Card Write-Protection SwitchInstalling a Flash Memory Card Determining Software Feature Support Power Management and Environmental MonitoringRemoving a Flash Memory Card Specification Module SpecificationsRegulatory Standards Compliance OL-10100-04 Cable and Connector Specifications Limiting Connection DistancesUplink Port Transceiver Modules Transceiver Module Part Numbers1GE Uplink Ports and Cabling Specifications Product ID DescriptionMMF SMF10GE Uplink Ports and Cabling Specifications SMF ITU-TConsole Port Cabling Specifications and Pinouts Gbic Module Cabling SpecificationsConsole Port Cabling Specifications MHz km MicronConsole Port Signals and Pinouts Rate bps Distance feet Distance metersSignal RJ-45 Pin DB-9 Pin RJ-45-to-RJ-45 RJ-45-to-DB-9 ConsoleRollover Cable DeviceRollover Cable Modem Adapter Signal RJ-45 Pin DB-25 Pin RJ-45-to-DB-25 Terminal ConsoleRJ-45-to-RJ-45 RJ-45-to-DB-25 RTS DTRConsole Port Mode 2 Signaling and Pinouts Sup2 Only RJ-45 ConnectorConsole Port Console Device Side 2 Pin Signal RD+ TD+ Not usedSC Connectors Fiber-Optic ConnectorsSide 1 Pin Signal Side 2 Pin Signal MT-RJ Connectors Figure B-5 SC Optical ConnectorLC Connectors Figure B-7 LC Fiber-Optic ConnectorCleaning the Fiber-Optic Connectors LX/LH Gbic and MMF Cable Considerations Patch CordPatch Cord Installation OL-10100-04 Active LED MACGBICs, connecting to Gigabit Ethernet cables Active ConsoleLink LED LX/LH GbicPWR Mgmt LED NvramStatus LED System LED

Related manuals

Manual 28 pages 32.67 Kb

Manual 12 pages 20.11 Kb

Manual 20 pages 62.17 Kb

Manual 10 pages 7.94 Kb