AAM1212 User’s Guide
Virtual Circuit Topology
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P P E N D I X
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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:
Figure 176
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.
• Virtual Channel
Logical connections between ATM switches
• Virtual Path
A bundle of virtual channels
• Virtual Circuits
A series of virtual paths between circuit end point
Summary of Contents for AAM1212
Page 1: ...AAM1212 ADSL2 Module over POTS in the IP DSLAM User s Guide Version 3 50 9 2005 ...
Page 23: ...AAM1212 User s Guide 22 ...
Page 27: ...AAM1212 User s Guide 26 ...
Page 35: ...AAM1212 User s Guide 34 Chapter 1 Getting to Know Your AAM1212 ...
Page 49: ...AAM1212 User s Guide 48 Chapter 3 Hardware Connections ...
Page 55: ...AAM1212 User s Guide 54 Chapter 4 Web Configurator Introduction ...
Page 63: ...AAM1212 User s Guide 62 Chapter 5 Initial Configuration ...
Page 71: ...AAM1212 User s Guide 70 Chapter 6 Home and Port Statistics Screens ...
Page 83: ...AAM1212 User s Guide 82 Chapter 7 Basic Setting Screens ...
Page 111: ...AAM1212 User s Guide 110 Chapter 8 ADSL Port Setup ...
Page 143: ...AAM1212 User s Guide 142 Chapter 18 Syslog ...
Page 151: ...AAM1212 User s Guide 150 Chapter 19 Access Control ...
Page 163: ...AAM1212 User s Guide 162 Chapter 22 Diagnostic ...
Page 181: ...AAM1212 User s Guide 180 Chapter 25 Commands Overview ...
Page 249: ...AAM1212 User s Guide 248 Chapter 29 IP Commands ...
Page 261: ...AAM1212 User s Guide 260 Chapter 30 Statistics Commands ...
Page 277: ...AAM1212 User s Guide 276 Chapter 33 Troubleshooting ...
Page 283: ...AAM1212 User s Guide 282 Virtual Circuit Topology ...