Glossary | V |
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UTOPIA
Universal Test & Operations Interface for ATM: Refers to an electrical interface between the TC and PMD sublayers of the PHY layer.
UTP
Unshielded Twisted Pair: A cable having one or more twisted pairs, but with no shield per pair.
V
VBR
Variable Bit Rate: An ATM Forum defined service category which supports variable bit rate data traffic with average and peak traffic parameters.
VC
Virtual Channel: Existing with a Virtual Tributary, in the terminology of SONET it is equivalent to a traditional TDM channel. It’s just a fancier for a channel, but maintaining the (virtual nomenclature of SONET).
A communications channel that provides for the sequential unidirectional transport of ATM cells.
VCC
Virtual Channel Connection: A concatenation of VCLs that extends between the points where the ATM service users access the ATM layer. The points at which the ATM cell payload is passed to, or received from, the users of the ATM Layer (i.e., a higher layer or
VCCI
Voluntary Control Council for Interference
VCI
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.
VCL
Virtual Channel Link: A means of unidirectional transport of ATM cells between the point where a VCI value is assigned and the point where that value is translated or removed.
Centillion 1200N ATM Switch User Manual | |
NTP |
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