Lucent Technologies SLC ConnectReach User & Service Manual page 531

Glossary 363-208-050
U
UAS — Unavailable Seconds. A one second interval during which service was not available; an
unavailable signal state is declared after 10 consecutive SESs.
UDP — User Datagram Protocol. An alternate transport-layer protocol of the TCP/IP protocol stack.
URG — Urgent; as in TCP statistics, "URG only" packets.
V
VFDE— Voice-Frequency Data Enhancement.
VPN — Virtual Private Network. A means by which ISPs can connect remote offices of a company by
means of the Internet.
W
WAN — Wide Area Network. A data network typically extending a LAN outside the building, over
telephone carrier lines to link to other LANs in remote buildings in possibly remote cities.
Web Browser — A software application used to locate and display World Wide Web (WWW) pages.
Wink Delay — A type of trunk signaling for incoming call. This signaling allows ANI and DNIS numbers to
be used with standard loop-start cards (that is, voice mail, fax) without the need for special signaling
converters. This is done by providing a "wink back" to the carrier after the analog line is answered so that
any digits delivered by the carrier may be received from the analog port.
Wink Start — The most common type of trunk signaling for incoming and outgoing calls. After the SLC
ConnectReach system detects the trunk going off-hook on an incoming call, it transmits a 200-millisecond
off-hook pulse, then returns to the on-hook state. The originating trunk detects this "wink back," waits at
least 210 milliseconds, sends out digits, and then rings the analog line. When the call is answered, the
SLC ConnectReach system transmits an off-hook pulse.
*
WINS — Windows Internet Naming Service. A system that determines the IP address associated with a
particular network computer. This is called name resolution. WINS supports network client and server
computers running Windows and can provide name resolution for other computers with special
arrangements.
* Windows is a registered trademark of Microsoft Corporation
GL-13
Issue 4 June 2002