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ZyXEL Communications 630-C Appendix B, Virtual Circuit Topology, Diagram 1 Virtual Circuit Topology

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Prestige 630-C Series ADSL USB Modem

Appendix B

Virtual Circuit Topology

ATM is a connection-oriented technology, meaning that it sets up virtual circuits over which end systems communicate. The terminology for virtual circuits is as follows:

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Virtual Channel	Logical connections between ATM switches
Virtual Path	A bundle of virtual channels
Virtual Circuit	A series of virtual paths between circuit end points

Diagram 1 Virtual Circuit Topology

Think of a virtual path as a cable that contains a bundle of wires. The cable connects two points and wires within the cable provide individual circuits between the two points. In an ATM cell header, a VPI (Virtual Path Identifier) identifies a link formed by a virtual path; a VCI (Virtual Channel Identifier) identifies a channel within a virtual path.

The VPI and VCI identify a virtual path, that is, termination points between ATM switches. A series of virtual paths make up a virtual circuit.

Your service provider should supply you with VPI/VCI numbers.

Virtual Circuit Topology

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Contents

ADSL USB Modem Copyright ZyXEL Limited Warranty Information for Canadian Users Federal Communications Commission (FCC) Interference Statement Customer Support Table of Contents Page List of Figures List of Diagrams List of Tables Preface Control Panels Modem Bold Times New Roman Bold Arial About ADSL About USB Part Page Getting to Know Your Prestige Page Hardware Installation 2.1.1 USB Connectors 2.1.2 Splitter and Microfilter 2.1.3 Front Panel LEDs Page Installing Your Modem 3.3.1 Mac OS 9 Installation 3.3.2 Mac OS X Installation Click the lock to make changes Figure 3-3Installation Authorization Continue Select a Destination Figure 3-4Select a Destination Drive Page Introducing the Web Configurator Figure 4-3New Port Detected Ethernet Adaptor (en x) Show TCP/IP Using DHCP Figure 4-4Network: TCP/IP Tab User ID Password Home Page Figure 4-5Home Page Status Information Figure 5-1ADSL Status Table 5-1ADSL Status 5.3Viewing LAN Status LAN Table 5-2LAN Status 5.4Viewing PPP Interface Status PPP Figure 5-2PPP Status Table 5-3PPP Status Page Basic Configuration Figure 6-1WAN Configuration Table 6-1WAN Configuration Table 6-2WAN Configuration Options 6.3Configuring LAN Figure 6-2LAN Configuration Table 6-3LAN Configuration The default IP address is 10.0.0.2. If you change the LAN IP address, you must to use the new IP address to access 6.4Configuring DNS DNS Figure 6-3DNS Configuration Table 6-4DNS Configuration 6.5Saving New Settings Save Settings Figure 6-4Save Settings Administrative Privileges 7.3ATM Status ATM Status Table 7-2ATM Status Figure 7-2ATM Status 7.4TCP Status TCP Status Figure 7-3TCP Status Table 7-3TCP Status 7.5ADSL Configuration ADSL Configuration Figure 7-4ADSL Configuration Table 7-4ADSL Configuration 7.6Admin Password Configuration Admin Password Configuration Figure 7-5Admin Password Configuration Table 7-5Admin Password Configuration 7.7User Password Configuration User Figure 7-6User Password Configuration Table 7-6User Password Configuration 7.8Miscellaneous Configuration Misc Configuration Figure 7-7Miscellaneous Configuration Table 7-7Miscellaneous Configuration 7.9Restoring Factory Defaults Reset to Factory Defaults Figure 7-8Restore Factory Defaults 7.10 Performing a Diagnostic Test Diagnostic Test Help Figure 7-9Diagnostic Test Table 7-8Diagnostic Test Table 7-8Diagnostic Test 7.11 System Log System Log Figure 7-10System Log Table 7-9System Log 7.12 Making a DSL Connection with PPPoE Networking Connect using PPPoE Figure 7-11Network: PPPoE Tab Connect Figure 7-12PPPoE Icon Connect 7.13 Uninstalling the Hardware and Driver It is recommended that you save and close all other running programs before uninstalling the modem driver Uninstall Yes Troubleshooting Page Appendix A Setting up Your Computer’s IP Address TCP/IP Control Panel Page Page Appendix B Virtual Circuit Topology Page Index