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Glossary
GL-5
8700-A2-GB20-00
April 2000
Virtual terminal protocol in the Internet suite of protocols. Allows the user of one host
computer to log into a remote host computer and interact as a normal terminal user for that
host.
Trivial File Transfer Protocol. A standard TCP/IP protocol that allows simple file transfer to
and from a remote system without directory or file listing. TFTP is used where FTP is not
available.
A circuit capable of acting as both a transmitter and a receiver.
A circuit capable of generating, modulating, and sending a signal for communication,
control, and other purposes.
Transmit Data. Pin 2 of the EIA-232 interface that is used by the DTE to transmit data to
the modem. Conversely, the modem uses Pin 2 to receive data from the DTE.
Unavailable Seconds. A count of one-second intervals when service is unavailable.
An operating system developed at AT&T Bell Laboratories and since used as the basis of
similar operating systems.
An ITU-T standard for a high-speed, 34-position, DCE/DTE interface.
Wide Area Network. A network that spans a large geographic area.
An outgoing signal transmitted when a DS1 or DS3 terminal has determined that it has lost
the incoming signal.
Telnet
TFTP
transceiver
transmitter
TXD
UAS
UNIX
V.35
WA N
Yellow Alarm