User`s manual

U.S. Robotics I-modem Command Reference
Glossary • Page G-41
terminal adapter
A device that connects another device that is not ISDN-ready to the ISDN S/T-interface.
By converting EIA-232 or V.35 signals, for example, to S/T-interface signals, a terminal
adapter makes a device that is not ISDN-ready able to communicate over the ISDN.
Terminal Endpoint IdentiÞer (TEI)
A one- or two-digit number that identiÞes a given connection with the central-ofÞce
switch. TEIs may be dynamic or Þxed. Dynamic TEIs are assigned automatically by the
switch with each call. Fixed TEIs require you to set the TEI in your ISDN device.
Terminal mode
An operational mode required for microcomputers to transmit data. In Terminal mode the
computer acts as if it were a standard terminal such as a teletypewriter, rather than a data
processor. Keyboard entries go directly to the modem, whether the entry is a modem com-
mand or data to be transmitted over the phone lines. Received data is output directly to the
screen. The more popular communications software products control Terminal mode as
well as enable more complex operations, including Þle transmission and saving received
Þles.