Paradyne 8784 manual GL-4

Glossary

router	A device that connects LANs by dynamically routing data according to destination and
	available routes.
RS-449	An Electronic Industries Association's standard for a general-purpose, 37-position,
	DCE/DTE interface.
RTS	Request to Send. A signal from the DTE to the device, indicating that the DTE has data to
	send. V.24 circuit 105.
RXD	Received Data. Pin 3 of the EIA-232 interface that is used by the DTE to receive data from
	the modem. Conversely, the modem uses Pin 3 to transmit data to the DTE.
SDSL	Symmetric Digital Subscriber Line. A technique for the use of an existing twisted-pair line
	that permits high bandwidth, bidirectional transmission.
SES	Severely Errored Seconds. Usually defined as a second during which a specific number of
	CRC errors was exceeded, or an OOF or other critical error occurred.
SNMP	Simple Network Management Protocol. Protocol for open networking management.
T1	A term for a digital carrier facility used to transmit a DS1 formatted digital signal at
	1.544 Mbps. It is used primarily in North America.
TCP/IP	Transmission Control Protocol/Internet Protocol. The dominant protocol suite in the
	worldwide Internet, TCP allows a process on one machine to send data to a process on
	another machine using the IP. TCP can be used as a full-duplex or one-way simplex
	connection.
TDM	Time Division Multiplexer. A device that enables the simultaneous transmission of multiple
	independent data streams into a single high-speed data stream by simultaneously sampling
	the independent data streams and combining these samples to form the high-speed
	stream.
Telnet	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.
TFTP	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.
transceiver	A circuit capable of acting as both a transmitter and a receiver.
transmitter	A circuit capable of generating, modulating, and sending a signal for communication,
	control, and other purposes.
TXD	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.
UNIX	An operating system developed at AT&T Bell Laboratories and since used as the basis of
	similar operating systems.
V.35	An ITU-T standard for a high-speed, 34-position, DCE/DTE interface.
WAN	Wide Area Network. A network that spans a large geographic area.
X.21	An ITU-T standard for a high-speed, 15-position, DCE/DTE interface.
Yellow Alarm	An outgoing signal transmitted when a DS1 or DS3 terminal has determined that it has lost
	the incoming signal.

GL-4 February 2001 8784-A2-GB20-30