Cisco Systems CGS 2520 manual 10/100BASE-T Ports, PoE and PoE+ Ports

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Chapter 1 Product Overview

Ports

10/100BASE-T Ports

You can set the 10/100BASE-T ports on the switch to operate in any combination of half duplex, full duplex, or 10 or 100 Mb/s. You can set the ports for speed and duplex auto-negotiation. The default setting is auto-negotiate.

When set for auto-negotiation, the switch determines the speed and duplex settings of the attached device, and advertises its own capabilities. If the connected device also supports auto-negotiation, the switch negotiates the best connection (the fastest line speed that both devices support and full-duplex transmission if the attached device supports it), and configures itself accordingly. In all cases, the attached device must be within 328 feet (100 meters).

The 10/100BASE-T ports use RJ-45 connectors with Ethernet pinouts. The maximum cable length is 328 feet (100 meters). The 100BASE-T traffic requires Category 5, Category 5e, or Category 6 unshielded twisted pair (UTP) cable. The 10BASE-T traffic can use Category 3 or Category 4 UTP cable.

PoE and PoE+ Ports

Warning Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if interconnections are made using uninsulated exposed metal contacts, conductors, or terminals. Avoid using such interconnection methods, unless the exposed metal parts are located within a restricted access location and users and service people who are authorized within the restricted access location are made aware of the hazard. A restricted access area can be accessed only through the use of a special tool, lock and key or other means of security. Statement 1072

The 10/100BASE-T PoE+ ports on the Cisco CGS-2520-16S-8PC and Cisco CGS-2520-16S-8PC-C models provide:

Support for IEEE 802.3af-compliant powered devices (up to 15.4 W PoE per port) and support for IEEE 802.3at-compliant powered devices (up to 30 W PoE+ per port).

Support for prestandard Cisco powered devices.

Configurable support for Cisco intelligent power management, including:

enhanced power negotiation

power reservation

per-port power policing

Each power supply module can support an equivalent PoE load of two PoE+ ports or four PoE ports. When both power supply modules are installed, the system has enough power to support four PoE+ ports, or eight PoE ports.

If ports are designated as high priority and low priority PoE or PoE+ ports at the command line interface (CLI), and one power supply module fails or is removed, power to the high priority ports is maintained, and power to the low priority ports is dropped. When assigning priority to PoE or PoE+ ports, it is important to assign priorities on the basis of power supply capacity.

For information about configuring and monitoring PoE ports, see the CGS 2520 Switch Software Configuration Guide on Cisco.com.

For information about port connections and port specifications, see the “Connecting Devices to the Ethernet Ports” section on page 2-24and the “Connector and Cable Specifications” section on page B-1.

Cisco CGS 2520 Hardware Installation Guide

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OL-31444-01

 

 

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Contents Cisco CGS 2520 Hardware Installation Guide Page N T E N T S Wall-Mounting Troubleshooting Accessing the CLI Through the Console Port C-1 Preface Obtaining Documentation and Submitting a Service Request Related Publications Product Overview Switch Models Cable SideModel Description Ports Cisco CGS-2520-16S-8PC Cable-Side View10/100BASE-T Ports PoE and PoE+ PortsDual-Purpose Gigabit Ethernet Ports SFP ModulesSFP Module Patch Cable Type of SFP Module ModelPower-Input Terminal Alarm PortsAlarm Input Alarm OutputLEDs Management PortsSwitch Panel LEDs System LEDColor System Status Power Supply Module LEDs Alarm LEDsConsole LEDs Port LEDs PoE LEDColor Description LED Color MeaningPower Supply Side SD Flash Memory CardDual-Purpose Port LEDs SD Flash Memory Card LEDPSU OK LED Power Supply-Side LEDs Power Supply FeaturesManagement Options Network Configurations Switch Installation 140F 60C Statement Installation Guidelines Verifying Switch Operation75 in .4 cm. Statement Installing the Switch Mounting into a RackMounting Brackets Attaching Brackets for 19-Inch Racks 2shows the 23-inch rack mounting bracketsAttaching Brackets for 19-Inch Racks Attaching Brackets for 19-Inch Racks IP-30 Compliance Inserting the Rubber Plugs Inserting the Rubber Plugs Inserting the Rubber Plugs detail Attaching Brackets for 19-Inch Racks Attaching Brackets for 23-Inch Racks 10 Attaching Brackets for 19-Inch RacksAttaching Brackets for Etsi Racks 11 Attaching Brackets for 23-Inch Racks12 Attaching Brackets for Etsi Racks Mounting the Switch into a Rack Wall-Mounting Attaching Brackets for Wall MountingWall-Mounting for IP-30 Compliance 14 Attaching 19-inch Rack Brackets for Wall Mounting15 Inserting the Rubber Plugs into the Switch Holes Installing and Removing SFP Modules Installing SFP Modules17 Installing an SFP Module Removing SFP ModulesInserting and Removing the SFP Module Patch Cable 18 Removing a Bale Clasp Latch SFP ModuleReplacing the SD Flash Memory Card Removing the SFP Module Patch Cable21 Loosening the Captive Screw Connecting Devices to the Ethernet Ports Device Crossover Cable Straight-Through CableConnecting to the 10/100 and 10/100/1000 Ports Connecting to the 10/100 PoE+ PortsWhere to Go Next Power Supply Installation Power Supply ModulesPower Supply Module Installation PWR-RGD-AC-DC Power Supply ModuleInstallation Guidelines Installing a Power Supply ModuleEquipment That You Need Grounding the Switch Dual-hole terminal lug Installing the Power Supply Module in the Switch Loosen the Screws on the Power Supply BlankWiring the Power Source AC 5 A, DC 15 a StatementPSU2 11 Stripping the Input Power Source Wire 12 Crimping the Spade Terminal Lug Removing the Power Supply Module AC power15 Removing the Screws Diagnosing Problems Switch Post ResultsSwitch LEDs Switch Connections Bad or Damaged CableEthernet and Fiber-Optic Cables Link Status10/100 and 10/100/1000 Port Connections 10/100 PoE+ Port ConnectionsSFP Module Switch Performance Interface SettingsPing End Device Spanning Tree LoopsAuto-Negotiation and Network Interface Cards Cabling DistanceResetting the Switch to the Factory Default Settings Finding the Switch Serial NumberSwitch Specifications Physical SpecificationsEnvironmental Ranges Power Requirements Power Requirements Power Supply Module Specifications Power SpecificationsConnector Specifications 10/100 Ethernet PortsSFP Module Connectors Figure B-2 Fiber-Optic SFP Module LC ConnectorAlarm Port Alarm RatingsDual-Purpose Ports Cables and Adapters SFP Module CablesIndustrial and Rugged SFPs Commercial SFPs100BASE-BX Extended temperature SFPs Cable PinoutsFigure B-6 Console Port Adapter Pinouts DSR DTR CTS RTSSwitch Console RJ-45-to-DB-25 Port DTE Adapter Device OL-31444-01 Accessing the CLI Through the Console Port RJ-45 Console PortFigure C-1 Connecting the Console Cable Figure C-2 Connecting the USB Console Cable USB Console PortInstalling the Cisco Microsoft Windows USB Device Drivers Installing the Cisco Microsoft Windows XP USB DriverInstalling the Cisco Microsoft Windows 2000 USB Driver Uninstalling the Cisco Microsoft Windows USB Drivers Installing the Cisco Microsoft Windows Vista USB DriverEntering the Initial Configuration Information IP SettingsUninstalling the Cisco Microsoft Windows Vista USB Driver Completing the Setup Program These choices appear