User`s manual

Chapter 6: Glossary
public network but in the private network.
VPI (Virtual Path Identifier) & VCI (Virtual Channel Identifier)
A VPI is a 8-bit field while VCI is a 16-bit field in the ATM cell header. A VPI identifies a link
formed by a virtual path and a VCI identifies a channel within a virtual path. In this way,
the cells belonging to the same connection can be distinguished. A unique and separate
VPI/VCI identifier is assigned in advance to indicate which type of cell is following,
unassigned cells, physical layer OAM cells, metasignaling channel or a generic broadcast
signaling channel. Your ISP should supply you with the values.
83