Cisco Systems SLM224G4PS, SLM248G4PS Appendix a About Gigabit Ethernet Fiber Optic Cabling

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Appendix A

About Gigabit Ethernet and Fiber Optic Cabling

Appendix A:

About Gigabit Ethernet

and Fiber Optic Cabling

Gigabit Ethernet

Gigabit Ethernet runs at speeds of 1Gbps (Gigabit per second), ten times faster than 100Mbps Fast Ethernet, but it still integrates seamlessly with 100Mbps Fast Ethernet hardware. Users can connect Gigabit Ethernet hardware with either fiber optic cabling or copper Category 5e cabling, with fiber optics more suited for network backbones. As the Gigabit standard gradually integrates into existing networks, current computer applications will enjoy faster access time for network data, hardware, and Internet connections.

Fiber Optic Cabling

Fiber optic cabling is made from flexible, optically efficient strands of glass and coated with a layer of rubber tubing, fiber optics use photons of light instead of electrons to send and receive data. Although fiber is physically capable of carrying terabits of data per second, the signaling hardware currently on the market can handle no more than a few gigabits of data per second.

Fiber cables come with two main connector types. The most commonly used fiber optic cable is multi-mode fiber cable (MMF), with a 62.5 micron fiber optic core. Single‑mode fiber cabling is somewhat more efficient than multi-mode but far more expensive, due to its smaller optic core that helps retain the intensity of traveling light signals. A fiber connection always require two fiber cables: one transmits data, and the other receives it.

Each fiber optic cable is tipped with a connector that fits into a fiber port on a network adapter, hub, or switch. In the USA, most cables use a square SC connector that slides and locks into place when plugged into a port or connected to another cable. In Europe, the round ST connector is more prevalent.

For Gigabit Ethernet, you must use the Linksys MGBT1, MGBSX1, or MGBLH1 miniGBIC modules with the Linksys Gigabit Switches. The MGBSX1 and the MGBLH1 require fiber cabling with LC connectors, and the MGBT1 requires a Category 5e Ethernet cable with an RJ-45 connector.

For Fast Ethernet, you must use the MFEFX1 (100BASE-FX) or MFELX1 (100BASE-LX) SFP transceivers.

24/48-Port 10/100 + 4-Port Gigabit Smart Switch with Resilient Clustering Technology and PoE

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Contents Port or 48-Port 10/100 + About This Guide About This GuideIcon Descriptions Online ResourcesTable of Contents Snmp Snmp Global Parameters Snmp Views Snmp Group ProfileAppendix B About Switch Stacking Gigabit Ethernet Fiber Optic CablingAppendix C Glossary Appendix D Specifications Appendix G Contact InformationChapter IntroductionSwitch LEDs and ports are located on the front panel Chapter Product OverviewProduct Overview Front PanelBack Panel Power The Power port is where you connect the AC powerSwitch’s LEDs and ports are located on the front panel Product Overview Chapter Installation InstallationPre-Installation Considerations Placement OptionsRack-Mount Placement Hardware InstallationDesktop Placement To set up a stack with six switches, follow these steps Uplinking the SwitchConfiguring Stack Mode Connect port G1 on Unit 3 to port G2 on Unit Power off the new unit 5 the former master unitConnect port G1 on Unit 2 to port G2 on Unit Login screen appears. Proceed to the Login section below Chapter Configuration Using Console InterfaceUsing telnet How to Use the Console Interface LoginSwitch Main Menu System Configuration MenuManagement Settings System InformationIP Configuration User & Password SettingsSecurity Settings Http Restore System Default Settings Reboot SystemStack Configuration File ManagementPort Configuration Port Status MenuSystem Mode PoE SettingsHelp LogoutChapter Configuration Using Web-based Utility SetupSetup Summary Device InformationSetup Zoom Setup Network SettingsOrange The administrator has closed down this port Clicking on a port displays the Port Configuration screenSetup Time Set TimeLocal Time Daylight SavingSetup Stack Management Port Management Port SettingsPort Management Sntp ServersPort Management Port Settings Port Configuration LAG Configuration Port Management Link AggregationPort Management PoE Power Settings Port Management LacpVlan Management Port Setting Vlan ManagementVlan Management Create Vlan Vlan TableJoin Vlan to Port Vlan Management Port to VlanVlan Management Vlan to Port Statistics Rmon History StatisticsStatistics Rmon Statistics Rmon History Table Rmon HistoryLog Table Alarm Table Statistics Rmon AlarmsAdd Alarm Statistics Interface Statistics Statistics Rmon EventsStatistics Port Utilization Security 802.1x Settings SecurityEthernet-like ParametersSetting Timer Security Port SecuritySecurity Management Access List Security Storm ControlBroadcast Only Counts only Broadcast traffic QoSSecurity Radius QoS CoS Settings QoS Queue SettingsCoS Settings CoS DefaultQoS Bandwidth QoS Dscp SettingsQoS Basic Mode Global Setting Spanning TreeSpanning Tree STP Status Spanning Tree Global STPSpeed Displays the speed at which the port is operating Spanning Tree STP Port SettingsBridge Settings Vlan Igmp Settings MulticastMulticast Igmp Snooping Multicast Bridge MulticastMulticast Bridge Multicast Forward All Snmp Global ParametersSnmp Views Snmp Group ProfileUser Name Provides a user-defined local user list Snmp Group MembershipSnmp Communities Snmp Notification Filter Snmp Notification RecipientBase Table Advanced TableAdmin Admin User AuthenticationUser Authentication Local User EditSecure The entry is defined for locked ports Admin Static AddressAdmin Dynamic Address Admin Port Mirroring Admin Cable TestQuery Clear Table If selected, this clears the MAC Address tableAdmin Save Configuration Admin Factory Default Admin Firmware UpgradeAdmin Reboot Admin Memory Logs Admin LoggingAdmin Server Logs Admin Flash Logs LogoutAppendix a Appendix a About Gigabit Ethernet Fiber Optic CablingGigabit Ethernet Fiber Optic CablingAppendix B About Switch Stacking About Switch StackingAppendix B Stack Building Quick StartAdvanced Stacking Stack ResiliencyUnit IDs Unit ID AllocationMaster Election Stack Units Startup ProcessMaster Discovery Unit and Port Configuration User ControlsStacking Examples Replacing a Failed Stack Member in a Running StackStack Master Failure and Replacement Subgroup Contains Both Master Unit and Backup Master Unit Splitting a StackMerging Two Stacks Both Stacks Kept Running During InsertionStacking Cable Failure Inserting Too Many UnitsGlossary Appendix CAppendix C Glossary Glossary Packet a unit of data sent over a network Mail protocol on the InternetAppendix C Appendix D Appendix D SpecificationsSpecifications Class of Service Port-based 802.1p Vlan priority-based Power in compliance with IeeeDimensions Management VlanWarranty Information Obtaining Warranty ServiceAppendix E Exclusions and LimitationsWarranty Information Technical SupportAppendix F Regulatory InformationRegulatory Information Appendix F Norsk Norwegian Miljøinformasjon for kunder i EU Appendix F Appendix G Contact Information