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AuroraPresto - User Guide
UDP
UNI
V
VC Mux
VCI
VC
Virtual Channel
VPI
A B C D E F G H I
Glossary-12
Universal Data Protocol/Universal Datagram
Protocol.
User to Network Interface. This specifies the
connection between end user equipment and the
network.
Virtual Circuit Multiplex address is a protocol used in
IP Encapsulation.
Virtual Channel Identifier: A unique numerical tag as
defined by a 16 bit field in the ATM cell header that
identifies a virtual channel, over which the cell is to
travel.
A Virtual Channel operates between each pair of
adjacent devices between the source and destination of
the information being transferred across an ATM
network, thus supporting the virtual connection (VC).
Each Virtual Channel has a unique Virtual Channel
Identifier (VCI). Virtual Channels are grouped by
switches into Virtual Paths. Since Virtual Channels in
different Virtual Paths may use the same VCI value,
the unique combination of VCI and VPI (Virtual Path
Identifier) is used to identify a specific Virtual Channel
between adjacent switches.
Virtual Path Identifier. A unique value that
distinguishes a Virtual Path from all the others that
are supported on the same physical link. A VPI value
is assigned to each Virtual Path when the connection
is set up. Since Virtual Channels in different Virtual
Paths may use the same VCI value, the combination of
VPI and VCI is used to uniquely identify a specific
Virtual Channel between adjacent switches.
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