Paradyne 7112 manual Glossary

Glossary

ACAMI allocation	Alternate Channel Alternate Mark Inversion. A method of allocating DS0 channels as a
method	group, so that every alternate DS0 channel does not carry data, but instead transmits and
	receives all ones.
agent	A software program housed within a device to provide SNMP functionality. Each SNMP
	agent stores management information and responds to the manager's request.
aggregate	A single bit stream that combines two or more bit streams.
AIS	Alarm Indication Signal. A signal transmitted instead of the normal signal to maintain
	transmission continuity and to indicate to the receiving device that a transmission fault
	exists.
AMI	Alternate Mark Inversion. A line coding technique used to accommodate the ones density
	requirements of T1 lines.
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.
BES	Bursty Errored Seconds. Seconds with more than one, but less that 320 CRC6 errors.
block allocation	A method of allocating DS0 channels as a group rather than individually.
method
BPV	Bipolar Violation. A modified bipolar signaling method in which a control code is inserted.
B8ZS	Bipolar with Eight Zero Substitution. A line coding technique used to accommodate the
	ones density requirement of T1 lines.
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.

7112-A2-GB20-20 March 1998 GL-1