Appendix; Diagram 1 Vpi's & Vci's - ZyXEL Communications Prestige 642 User Manual

VPI & VCI
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:
VC (virtual channel)
VP (virtual path)
Think of a VP 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 and a VCI (Virtual Channel Identifier) identifies a
channel within a virtual path. The VPI and VCI are identified and correspond to termination points at ATM
switches as shown. Your telephone company should supply you with these numbers.

Appendix

Prestige 642 ADSL Internet Access Router
Logical connections between end stations
A bundle of VCs
Diagram 1 VPI's & VCI's.
Appendix
G