Enterasys Networks RBT-4102 manual Component Description, Antennas, External Antenna Connectors

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Introduction

Component Description

Antennas

The access point includes integrated diversity antennas for wireless communications. A diversity antenna system uses two identical antennas to receive and transmit signals, helping to avoid multipath fading effects. When receiving, the access point checks both antennas and selects the one with the strongest signal. When transmitting, it will continue to use the antenna previously selected for receiving. The access point never transmits from both antennas at the same time.

The antennas transmit the outgoing signal as a toroidal sphere (doughnut shaped), with the coverage extending most in a direction perpendicular to the antenna. The antenna should be adjusted to an angle that provides the appropriate coverage for the service area. For further information, refer to “Position the Antennas” on

page 2-3.

External Antenna Connectors

The access point supports external antenna connections for both the 2.4 GHz and 5 GHz radios. These antennas offer a variety of options for extending the radio range and shaping the coverage area. For a list of external antennas, their model type and gain refer to “External Antennas” on page C-8.

For information on the external antennas available, refer to the RoamAbout RBT-4102 /RBT-1602 Wireless Access Point Antenna Site Preparation and Installation Guide. This document is available for download from http://www.enterasys.com/products/wireless.

LED Indicators

The access point includes four status LED indicators, as described in the following figure and table.

Power

Ethernet

802.11a

802.11b/g

Wireless

Wireless

 

Link/Activity

 

Link/Activity

Link/Activity

1-4

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Contents Enterasys RoamAbout Page Page Compliances RBT-4102, RBT-4102-BG, and RBT-4102-EUIndustry Canada Statement RBT-4102-EUIii EC Conformance Declaration Operation Using 5 GHz Channels in the European Community Usage RBT-4102C and RBT-4102C-EU ViiRBT-4102C-EU ViiiPage Operation Using 5 GHz Channels in the European Community EC-Konformitätserklärung Xii EnglishXiii Italian ITPower Cord Set XivPower Cord Set Hazardous Substances XviXvii You and Enterasys agree as followsXviii Xix Compliances Xxi Xxii Table of Contents Appendix C Specifications XxivPreface PurposeIntended Audience Associated DocumentsWorld Wide Web Phone Getting HelpXxvi Introduction Top Panel Package ChecklistHardware Description Hardware Description Rear PanelExternal Antenna Connectors LED IndicatorsComponent Description AntennasStatus Description Security SlotConsole Port Ethernet Port Reset Button Power ConnectorIntroduction Hardware Installation Hardware Installation Page Hardware Installation Required Connections Access Point ConfigurationUsing the CLI Access Point Configuration LoggingUsing the CLI Enter no ip dhcp to disable Dhcp Using the CLI Using Web Management Using Web Management Access Point Configuration Using Web Management Access Point Configuration Using Web Management Access Point Configuration Using Web Management Access Point Configuration Network Configuration Ad Hoc Wireless LAN no Access Point Network TopologiesInfrastructure Wireless LAN Infrastructure Wireless LAN for Roaming Wireless PCs Infrastructure Wireless Bridge Network Configuration Appendix a Troubleshooting Diagnosing Access Point IndicatorsTroubleshooting Chart Symptom ActionTroubleshooting Appendix B Cables and Pinouts Twisted-Pair Cable AssignmentsPin MDI Signal Name MDI-X Signal Name 10/100BASE-TX Pin AssignmentsStraight-Through Wiring Crossover WiringWiring Map for Serial Cable Console Port Pin AssignmentsAppendix C Specifications General SpecificationsMaximum Channels Data RateNetwork Configuration AC Power AdapterUnit Power Supply Modulation TypeWeight LED IndicatorsTemperature Physical SizeRadio Signal Certification SafetyCompliances StandardsIeee 802.11b Data Rate SensitivityIeee 802.11g Data Rate Data Rate 15-5.250 25-5.350 50-5.700 725-5.825 Transmit PowerIeee 802.11a 802.11a Wireless Distance Table Speed and Distance Ranges1 802.11g Wireless Distance Table Speed and Distance Ranges1802.11b Wireless Distance Table Speed and Distance Ranges1 Operating RangeExternal Antennas External Antennas Specifications Index Index-1Index-2
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