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1813 VoIP Gateway User's Guide
VDSL:
Very-high-speed DSL. A DSL protocol running at up to 52 Mbps, that is restricted to
short distances.
virtual circuit:
A logical circuit established between two devices at the start of transmission
VOD:
Video On Demand. A service that provides video to subscribers upon request.
VPI:
Virtual Path Identifier
VPI:
Virtual Path Identifier. The 8-bit field in an ATM cell header that specifies the routing path
for a cell.
VPN:
Virtual Private Network. A network implemented over a public network that is made
"private" by use of encryption.
VT100:
A terminal used for asynchronous communications.
WAN:
Wide area network. A communications network that connects geographically separated
areas (Compare with LAN).
xDSL:
A generic term for all varieties of DSL.
XOFF:
A character that notifies a device to stop transmitting data.
XON:
A character that notifies a device to start or resume transmitting data.
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