3Com 7000 manual Using Isdn to Support Leased Line WAN Circuits

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Introduction 1-3

installation and rental of ISDN lines has dropped to the point where it is extremely attractive as regards cost and performance.

Using ISDN to Support Leased Line WAN Circuits

ISDN provides an ideal service to connect remote LANs. To be effective, the connecting bandwidth needed is at least 56 Kbps to achieve a realistic throughput. Slower speed links can be used but usually only when usage is low and infrequent, or if higher speed circuits cannot be provided.

Leased digital point-to-point circuits can still be cost effective if usage spans many hours per day. However as ISDN tariffs reduce, this balance also changes. ISDN can be used to provide effective backup of these point-to-point WAN circuits in two ways.

■Firstly, if the point-to-point circuit fails, an ISDN channel can be dialled-up automatically and quickly, to provide an alternative path to the remote unit.

■Secondly, if the leased circuit becomes heavily loaded due to peaks in the traffic between remote bridges or routers, additional bandwidth can be automatically dialled-up to supplement the bandwidth of the leased circuit. The interconnected bridges would then treat the leased line and ISDN channel as parallel links, sharing the load across the two.

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Contents Accessbuilder BRIDGE/ROUTER Module User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Important Safety Information Wichtige Sicherheitshinweise ’INFORMATION DE Sécurité Importante Page Contents Installation and Operation BRIDGE/ROUTER Specification and Cable PIN Assignments Index Limited Warranty FCC Class a Verification Statement Introduction About this GuideThis table shows where to find specific information How to Use This GuideIcon conventions that are used throughout this guide are ConventionsAdditional Safety Information Additional Safety Information About this Guide BRIDGE/ROUTER Module Benefits of Isdn Using Isdn to Support Leased Line WAN Circuits Principal Features Novell Network Typical ApplicationsConnecting To a Remote Novell Network 192.100.100.xxx IP Host on the Same IP NetworkBRIDGE/ROUTER Module IP Routed Network IP Host on Another IP NetworkPPP Connections To The Internet and Corporate Network Internet or PPP RouterMultiple Connections From a Single Site Multiple Connections from a Single SiteRegistering Ownership of your Bridge/Router Module Pack Contents ChecklistPre-installation Requirements BRIDGE/ROUTER Module Overview Installation and OperationPRI Bridge/Router Module Installing The ModuleInstallation BRI Bridge/Router ModuleInstalling The Module Installing the Rear Card Example Of Installing a Front Card Installing the Front CardManager Connecting the CablesWAN Ports 8 BRI Bridge/Router Front Panel LEDsPRI Bridge/Router Test Lights during the power-on self testMonitoring Isdn Line Usage Configuring the Bridge/Router ModuleEdit WAN Port Screen Setting Up a WAN LinkInstallation and Operation Troubleshooting Guide TroubleshootingManagement Problems Bridge/Router Does not Connect to the Remote Device Power LED Does Not LightISDN/CHANNEL LEDs Do Not Light Other LEDs Do Not LightIsdn Connector Interface SpecificationsLAN Connector Interfaces WAN Connector InterfaceBridge Characteristics Management Connector InterfacePerformance Physical Description ApprovalsAUI Cable LAN Port Pin AssignmentsIsdn Port Cable Pin Assignments 10BaseT Connecting Cable21/V.11 WAN Port Cable Pin Assignments24/V.28 35/V.36 Management Port Cable Pin Assignments Page 3Com Bulletin Board Service On-line Technical ServicesCall the telephone number nearest you World Wide Web SiteSupport from Your Network Supplier Support from 3Com Returning Products for Repair Appendix B Technical Support Numerics IndexSRC Master LED SRC Slave LED Limited Warranty 408 764-5000 3/18/96 How to Identify and Resolve Radio-TV Interference Problems
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7000 specifications

The 3Com 7000 is a robust and versatile networking solution designed to meet the demands of enterprise environments. Renowned for its reliability and scalability, the 3Com 7000 is highly suitable for organizations requiring efficient data handling and enhanced network performance. This multi-layer switching platform integrates advanced technologies, making it a preferred choice for modern businesses.

One of the standout features of the 3Com 7000 is its modular architecture. This design allows businesses to customize their network according to specific requirements by adding or replacing various modules. The modularity ensures that organizations can scale their network operations without significant downtime or the necessity of overhauling existing infrastructure. Such flexibility is vital for growing enterprises that need to adapt to variable workloads.

The 3Com 7000 also incorporates advanced Layer 3 routing capabilities. This feature enhances the efficiency of data transmission and bolsters the overall responsiveness of the network. By allowing routing functions to occur directly on the switch, it reduces latency and optimizes traffic flow, which is critical for applications requiring high availability, such as VoIP and video conferencing.

Security is another core characteristic of the 3Com 7000. It comes equipped with built-in security protocols and features such as Access Control Lists (ACLs) and VLAN support, which segregate network resources and protect sensitive data. These security measures ensure that only authorized devices can access specific segments of the network, thus fortifying the organization's information security posture.

In terms of management, the 3Com 7000 offers an intuitive interface for monitoring and controlling network operations. It supports various management protocols and software, which facilitate streamlined administration and configuration. This ease of management can significantly reduce the operational burden on IT staff, allowing them to focus on strategic initiatives.

Additionally, the 3Com 7000 is designed for high performance. It supports extensive bandwidth and low-latency communications, making it ideal for high-demand applications. The ability to handle multiple simultaneous connections without compromising speed makes it an excellent choice for enterprises that rely on real-time data processing.

In summary, the 3Com 7000 is a sophisticated networking solution characterized by its modularity, advanced routing capabilities, robust security features, user-friendly management, and high performance. These attributes make it a compelling choice for enterprises looking to enhance their networking infrastructure for a competitive edge.
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