Vanguard Managed Solutions 342 installation manual DSL/Cable Modem

Page 36

Target Applications

DSL/Cable Modem

Introduction	The Vanguard 342 enables connectivity to high-speed broadband services such as
	DSL and Cable by connecting the 10/100BaseT port on the Vanguard 342 to the
	Ethernet port on the DSL or Cable modem.

Cable modem speeds vary in the downstream direction. Network speeds can reach 27 Mbps., but this is an aggregate amount of bandwidth that is shared by users. Few computers will be capable of connecting at such high speeds, so a more realistic number is 1 to 3 Mbps. In the upstream direction speeds can be up to 10 Mbps. Most modem producers have selected a more optimum speed between 500 Kbps and 2.5 Mbps.

Remote Branches

Head Office

PBX

LAN 2

LAN 1

10/100

DSL/Cable

VANGUARD

Modem

auto-sensing

342

6435

	HR and
Sales,	Finance

Marketing,

Engineering

Figure 1-7. LAN Over WAN (DSL/Cable Modem)

1-16	About the Vanguard 342

Image 36

Contents Vanguard Managed Solutions Restricted Rights Notification for U.S. Government Users Restricted Rights LegendProprietary Material Radio Frequency Interference RegulationsTelecommunications Regulations Page Contents Contents About This Manual OverviewThis Chapter Description About This Manual Related Documentation OtherDocumentation Documentation Kit IncludesAbout This Manual Page Special Notices and Translations Simplified Chinese Danish SærligeOverskrifter Dutch Bijzondere VermeldingenFinnish Erityisilmoitukset French MessagesGerman Besondere HinweiseItalian Simboli specialiJapanese Korean Norwegian Spesielle MerknaderPortuguese Portugal Spanish/Spain NotificacionesEspeciales Swedish SpeciellaVarning Customer Information CustomerQuestions Comments AboutPage Customer Response Card Page Chapter Vanguard 342 Description DescriptionLimitations Features and Functionality Daughtercard FunctionalityTarget Applications What is a VPN? Advantages of a Virtual Private NetworkRequirements of a Hardware-based VPN Solution for Site-to-Site Applications Hardware OptionsStandard-based Tunneling and Encryption for IP Traffic IPSecSecurity Features Encryption over IP, Frame Relay, and X.25 NetworksIP and Serial Protocols over Frame Relay IP and Serial Protocols over Frame RelayVideo and Serial Protocols over Public or Private Networks Video and Serial Protocols over Public or Private NetworksSpeeds Application Daughtercard Application Description Type Used DSU DIM, FXS/FXOSoho and Branch Office to Central Office over Isdn Small Home and Branch Office to Central Office ApplicationOffice Type Daughtercard Used Description DSL/Cable Modem 342LAN Over WAN G.SHDSL Daughtercard Installed Shdsl DaughtercardLAN Segmentation LAN SegmentationVirtual LAN Vlan 10. VlanClocking Limitations Vanguard LimitationVanguard 342 DCE INT -- VG6560/VG320/VG64xx EXT at 1.5 Mbps Vanguard 342 DCE INT -- VG6560 SDB2 EXTChapter Hardware Description OverviewEnclosure Introduction Vanguard 342 Enclosure Front PanelRear Panel Vanguard 342 Rear PanelMotherboard GeneralAccess MotherboardDaughtercards Vanguard 342 Compatible Flash Simm Devices are as follows Vanguard 340 Compatible Flash Simm Devices are as followsVanguard Daughtercards DIMCompatibility Port FXS/FXO Voice Daughtercard Connector FXO Daughtercard 10. Dual E&M Daughtercard Connector Dual E&M12. Isdn and Enhanced Isdn BRI-S/T Daughtercard Connector Isdn Enhanced Isdn BRI-S/T Data Isdn BRI Voice14. DSU Daughtercard Connector 16. V.90 Daughtercard Connectors ModemPage Installation and Replacement Checking Your Shipment Contents Installing The Vanguard Selecting and Preparing the Installation Site Proper Cable and Air Clearance Installing Your Vanguard InstallationStep Action Inlet Temperature Power SupplyThermal Considerations FanConfiguring the Serial Interface Interface TypeInterface Option Setting the Interface Type Configure PortParameter Step Action Result/DescriptionSetting the Interface Options PortEnter Types Cabling the Vanguard PanelPort Characteristics and Cabling Characteristics Cable RequirementsPort Connector Interface Cable Required Speed Application SpecificDTE DCEConnectors Configure portCable Information RJ45 Pin Signal Pin Connection On DB25F Adapter RJ45 PinoutPin Signal 10/100BaseT Adapter CableFunction/Signal Port DTE Signal using Pin Name Test Mode External Transmit Clock Make BusyPort3 Adapter CableDB25 V.35/V.36 Pinouts CLOCK-B External External Transmit CLOCK-APort DCE Signal Function/Signal DTE Signal Pin Name Using CONTROL-B Signal ElementTIMING-A Received DATA-B TIMING-B External Transmit Clock B Clock aConnections mode Crossover Cable ConnectionsModifying Your Vanguard Installing Vanguard Daughtercards VanguardAccessing the Motherboard AccessingVanguard 342 Motherboard Removal and Replacement Procedure for Installing MotherboardRemoving Motherboard StepAdding and Removing Memory Modules Sdram DimmFlash Simm Adding/Removing Adding/Removing Data Compression Encryption SimmSimm and Dimm Installation/Replacement Location of Motherboard Components Simm and Dimm Slots Sdram Dimm Flash SimmInstalling/Removing the Lithium Battery Installing Battery RemovingPage Powering Up and Loading Software Overview Powering Up Your Vanguard Powering OnResetting Powering Off The Vanguard Approved Practice for Powering Down a Vanguard UnitPowering Off The Vanguard Powerup Diagnostics Detailed FrontPanel LEDs Power Up When This indicatesSequence GreenAccessing the Control Terminal Port Using Remote Using SoTCPTelnet EnterObtaining and Installing Operating Software Where to GetOperating Software File Formats Filename DescriptionSpecifications HardwareSoftware Specifications Appendix B Software License and Regulatory Information OverviewHow to Order Connections RJ48SRJ49C RJ48CCustomer-Provided TelephoneEquipment Product Declarations and Regulatory Information CE MarkingDeclarations Conformity Verklaring van overeenstemmingItalian Dichiarazione di conformità Product Declarations and Regulatory Information Page Limited Warranty Page Return Procedures Introduction For Locations ContactFactory Repair Index NumericsCTP Simm Index-3