TERMINAL GROUP
Series of terminals grouped under the same directory number. Any call to that number is routed to a free
terminal line.
TFTP
Trivial File Transfer Protocol. The simplest network application for transferring files.
TL
(Analog) Trunk Line connecting the system to the public switched network.
TLS
Transport Layer Security.
TSAPI
Telephony Services API. Standard defined by Novell, based on ECMA's CSTA standard.
TSP
Telephony Service Provider. TAPI driver used to access to telephony devices (modem, phone set, etc.).
8.20 U
UAI
Universal Alcatel Interface. Board used for connecting up digital terminals or DECT 4070 IO/EO base
stations.
UDA
Universal Directory Access offering the possibility to use the company directory or an external LDAP
directory when it exists to find a listed contact.
UPS
Uninterruptible Power Supply. Device increasing the system's backup time.
URL
Uniform Resource Locator. Address of a resource (file, program, image, etc.) accessible on the Internet.
UUS
User to User Signaling. Information carried clear end-to-end by ISDN to enable exchanges between
network subscribers; the ISVPN protocol is contained within this information.
8.21 V
VMU
Voice Mail Unit. The integrated voice server provides a voice mailbox for each user, as well as a general
voice mailbox and features such as Personal Assistant, Automatic Attendant and Audiotex.
VoIP
Voice over IP. Term designating voice transmission over a data network using the Internet protocol.
VoWLAN
Voice over WLAN. Term designating voice transmission over a data network using the WLAN.
VPN
Virtual Private Network. Private data network that uses the public telecommunications infrastructure (e.g.
the Internet) while maintaining confidentiality by means of tunneling protocols and security procedures.
8.22 W
WAN
Wide Area Network. A geographically dispersed telecommunications network. The term WAN is used in
contrast to LAN.
WIFI
Wireless Fidelity.
WINS
8-9
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