Interphase Tech RAS Communications Controller 5536 - Manual (Page 236)

Glossary
216 Interphase Corporation
TEI (Terminal Endpoint Identifier) ‹ The Terminal Endpoint Identi-
fier is used to identify a specific piece of equipment on an ISDN con-
nection.
Telco ‹ Telco is a popular abbreviation for telephone company. The
RBOCs are a subset of all telcos.
T Interface ‹ The interface point between the user premises network
termination (NT1) and a switching or concentration point (NT2) such
as PBX.
Tx ‹ Abbreviation meaning transmit, transmitter, or transmission.
U Interface ‹ The interface point between the user premises network
termination (NT1) and the local digital exchange.
UNI ‹ See user to network interface.
User to network interface (UNI) ‹ The interface between the ATM
end system (user) and the ATM network.
V.11 ‹ International interface recommendation electrically similar to
RS-422.
V.24 ‹ International interface recommendation that defines inter-
change circuits. Similar to and operationally compatible with RS-232.
(See
RS-232 .)
V.25 ‹ International interface recommendation for dial lines.
V.25 bis ‹ International interface recommendation for dial lines that
includes an auto-dial command and response language.
V.28 ‹ International interface recommendation that defines electrical
characteristics for the interchange circuits defined by V.24. Similar to
and operationally compatible with RS-232. (See
RS-232 .)
V.35 ‹ International recommendation for a wide-band interface
modem.
VN3/VN4 ‹ VN3 and VN4 are the French ISDN standards.
WAN (Wide Area Network) ‹ A network spanning a large geographi-
cal area that provides communications among devices on a regional,
national, or international basis.
Workstation networked computer typically reserved for end-user
applications.
X.21 ‹ (Packet-switched networks) International recommendation
that defines a physical interface for X.25, using a 15-pin connector
equivalent to V.11.