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Glossary
TEI (Terminal Endpoint Identifier) The Terminal Endpoint Identifier 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
V.24 International interface recommendation that defines interchange circuits. Similar to and operationally compatible with
V.25 International interface recommendation for dial lines.
V.25 bis International interface recommendation for dial lines that includes an
V.28 International interface recommendation that defines electrical characteristics for the interchange circuits defined by V.24. Similar to and operationally compatible with
V.35 International recommendation for a
VN3/VN4 VN3 and VN4 are the French ISDN standards.
WAN (Wide Area Network) A network spanning a large geographical area that provides communications among devices on a regional, national, or international basis.
Workstation networked computer typically reserved for
X.21
216 | Interphase Corporation |