Cisco Systems 3120 SFP Module Cable Specifications, Two Twisted-Pair Cable Pinouts, 1000BASE-SX

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Appendix B Connector and Cable Specifications

Cable and Adapter Specifications

SFP Module Cable Specifications

Table B-3lists the cable specifications for the fiber-optic SFP module connections. Each port must match the wave-length specifications on the other end of the cable, and for reliable communications, the cable must not exceed the required cable length. Copper 1000BASE-T SFP transceivers use standard four twisted-pair, Category 5 (or greater) cable at lengths up to 328 feet (100 meters).

Table B-3	Fiber-Optic SFP Module Port Cabling Specifications

		Wavelength		Core Size/Cladding	Modal Bandwidth
SFP Module		(nanometers)	Fiber Type	Size (micron)	(MHz/km)1	Cable Distance
1000BASE-SX		850	MMF	62.5/125	160	722 feet (220 m)
(GLC-SX-MM)				62.5/125	200	902 feet (275 m)
				50/125	400	1640 feet (500 m)
				50/125	500	1804 feet (550 m)

1000BASE-T (GLC-T)		N/A

1. Modal bandwidth applies only to multimode fiber.

Two Twisted-Pair Cable Pinouts

Figure B-6and Figure B-7show the schematics of two twisted-pair cables for connecting to 10BASE-T- and 100BASE-TX-compatible devices.

Figure B-6

Switch

3TD+

6 TD–

1RD+

2 RD–

Figure B-7

Switch

3TD+ 6 TD–

1RD+ 2 RD–

Two Twisted-Pair Straight-Through Cable Schematic

Router or PC

3 RD+ 6 RD–

	1 TD+	H5578
	2 TD–	H5578
	2 TD–

Two Twisted-Pair Crossover Cable Schematic

Switch

3TD+

6TD–

	1 RD+	H5579
	2 RD–	H5579
	2 RD–

Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide

	B-6	OL-12246-01

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Contents March Americas HeadquartersPage N T E N T S Setup Accessing the CLI Through the Console Port OL-12246-01 Audience PurposeOrganization Conventions Related PublicationsPreface OL-12246-01 Switch Module Features Overview Product OverviewUID 1 LED Port DescriptionOther Features Switch Module Console Port10/100/1000 Ports Gigabit Ethernet Module SlotsCisco TwinGig Converter Module LRMLEDs System LEDStack LED Color System StatusStack Master LED Stack Member LEDUID and Health LEDs RJ-45 Uplink Port LEDsX2 Module Installed Only the CBS3120X Switch Gigabit Ethernet Module Slot Port LEDsPower Connectors Management OptionsStackWise Plus Ports Using the Device Manager Device ManagerUsing the Command-Line Interface Network ConfigurationsSwitch Installation Preparing for InstallationSafety Warnings Installation Guidelines Verifying Package Contents HP c-Class BladeSystem Enclosure Architecture Rear View of the Blade EnclosureInstalling the Switch Module in the Blade Enclosure StatementOpen the Release Latch Switch Module IP Addresses Switch Installation Onboard Administrator Interconnect Bay Summary Window Using Express Setup Express Setup Advanced Settings TableSetting the Installed Switch Module As the Stack Master Enter switch 1 priorityPlanning and Creating a Switch Stack Refreshing the PC IP AddressStack Cabling Configurations 250304 Connecting to the StackWise Plus Ports Installing Devices in the 10-Gigabit Ethernet Slots Installing a Transceiver or Converter Module 12 Installing X2 Transceiver Modules Removing a ModuleInstalling SFP Modules Installing an SFP Module14 Converter Module with SFP Modules Installed Removing an SFP ModuleConnecting to the 10/100/1000 Ports 15 Connecting to an Ethernet PortPlanning 10/100/1000 Ethernet Port Connections Where to Go Next Device Crossover CableSwitch Installation Where to Go Next Diagnosing Problems Verify the Switch Module Post ResultsLook at the Switch Module LEDs Confirm the Switch Module ConnectionsBad or Damaged Cable Ethernet and Fiber CablesSFP Module Port Issues Port and Interface SettingsPing the End Device Spanning Tree LoopsVerify the Switch Module Performance Speed, Duplex, and AutonegotiationAutonegotiation and Network-Interface Cards Cabling DistanceClearing the Switch Module IP Address and Configuration Replacing a Failed Stack MemberLocating the Switch Module Serial Number 250310OL-12246-01 Physical Dimensions Environmental RangesOL-12246-01 Connector and Cable Specifications Connector SpecificationsConnecting to 10BASE-T- and 100BASE-TX-Compatible Devices Connecting to 1000BASE-T Devices Gigabit Ethernet Module Interfaces Cisco TwinGig Converter Module PortsCable and Adapter Specifications Gigabit Ethernet X2 Transceiver Module Cable SpecificationsConsole Port Microns MHz/km DistanceX2 Product Transmit Power Receive Power Number TransmitDBm Wavelength nm SFP Module Cable Specifications Two Twisted-Pair Cable Pinouts1000BASE-SX GLC-SX-MMFour Twisted-Pair Cable Pinouts for 1000BASE-T Ports TP3Switch Console RJ-45-to-DB-9 Port DTE Identifying a Crossover CableConsole Port Adapter Pinouts DeviceSwitch Console RJ-45-to-DB-25 Port DTE OL-12246-01 Accessing the CLI Through the Console Port Connecting to the Console PortOL-12246-01 Figure C-1 Connecting through the Switch Module Console Port Completing the Initial Configuration To configure Snmp now, enter yes These choices appear Numerics CLIIN-2 UID PostLED IN-4IN-5 IN-6

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