Paradyne 7510 DSU manual Glossary

Glossary

aggregate	A single bit stream that combines two or more bit streams.
ASCII	American Standard Code for Information Interchange. A 7-bit code that establishes
	compatibility between data services. ASCII is the standard for data transmission over
	telephone lines.
ASCII Terminal or	Devices that can be attached, either locally or remotely, to display or print the DSU's alarm
Printer	messages.
asynchronous	A data transmission that is synchronized by a transmission start bit at the beginning of
	a character (five to eight bits) and one or more stop bits at the end.
AT Command Set	Attention Command Set. A group of commands, issued from an asynchronous DTE, that
	allows control of the modem while in Command mode. All commands must begin with the
	characters AT and end with a carriage return.
ATI	Asynchronous terminal interface. This feature allows a device to be controlled from an
	async (asynchronous) terminal like an ASCII (VT100-compatible) terminal.
autobaud mode	An operational mode in which the DSU forces automatic setting of the DDS line rate/speed
	(56 or 64 kbps) as soon as a valid DDS network signal is detected.
AUX port	The auxiliary communications port on a router.
BPV	Bipolar Violation. A modified bipolar signaling method in which a control code is inserted.
CCA	Circuit Card Assembly. A printed circuit board to which separate components are attached.
CCITT	Consultative Committee on International Telegraphy and Telephony. See ITU.
CD	Carrier Detect. A signal indicating that energy exists on the transmission circuit.
	Associated with Pin 8 on an EIA-232 interface.
channel	An independent data path.
CMI	Control Mode Idle. A control signal sent over the DDS line to indicate that no data is being
	sent.
COM port	Communications port. A computer's serial communications port used to transmit to and
	receive data from a DCE. The DCE connects directly to this port.
configuration option	Device software that sets specific operating parameters for the DSU.
CPE	Customer Premises Equipment. Terminating equipment supplied by either the customer or
	some other supplier that is connected to the telecommunications network (e.g., DSUs,
	terminals, phones, routers, modems).
CSU	Channel Service Unit. The function of the DSU that protects the T1 line from damage and
	regenerates the T1 signal.
CTS	Clear to Send. An EIA-lead standard for V.24 circuit CT 106; an output signal
	(DCE-to-DTE).
DCE	Data Communications Equipment. The equipment that provides the functions required to
	establish, maintain, and end a connection. It also provides the signal conversion required
	for communication between the DTE and the network.
DDS	Digital Data Service. Provides digital communication circuits.

7510-A2-GB20-10 November 1997 GL-1