Paradyne 316x manual Glossary, Async Terminal, Auxiliary Backplane, B8ZS, DSX-1, Dtmf

Glossary

AIS	Alarm Indication Signal. A signal transmitted instead of the normal signal to
	continue transmission continuity and to indicate to the receiving terminal that a
	transmission fault exists at either the transmitting terminal or upstream of the
	transmitting signal. Sometimes referred to as Blue Alarm.
AMI	Alternate Mark Inversion. A line encoding technique and a bipolar return-to-zero
	signal.
Async Terminal	This feature allows a DSU/CSU to be controlled from an asynchronous (async)
	terminal. When this feature is enabled, the async terminal menus and displays
	emulate the DCP without being limited to the 2-line LCD display.
Auxiliary Backplane	An 8-slot backplane that fits over one half of the open section of the 3000 Series
	Carrier. This is a passive assembly that provides interconnect capability between
	3151 CSUs and 3161 DSU/CSUs and provides all interface connectors.
AWG	American Wire Gauge.
BES	Bursty Error Seconds. A second in which more than one, but less than 320 CRC6
	error events, have occurred.
BPV	Bipolar Violation. A modified bipolar signaling method in which a control code is
	inserted into the original data format.
B8ZS	Bipolar with 8 Zero Substitution.
CRC	Cyclic Redundancy Check. A method of error detection.
CSU	Channel Service Unit. Protects the T1 line from damage and regenerates the
	T1 signal.
DCE	Data Communications Equipment.
DSU	Data Service Unit. Data communications equipment which transmits digital data
	over a private line. Also used for limited distance communications over the PSTN
	when a high-speed modem is not needed.
DS0	Digital Signal level 0. A signal of worldwide standard speed for PCM digital voice
	channels running at 64 kbps.
DS1	Digital Signal level 1. A signal of 1.544 Mbps in North America.
DSX-1	Digital Signal Cross Connect level 1. An interconnection point for terminals,
	multiplexers and transmission facilities.
DTE	Data Terminal Equipment.
DTMF	Dual Tone Multifrequency. The basis of operation for a pushbutton telephone.
D4	The transmission standard that specifies 12 frames as a superframe that is used for
	frame synchronization and to locate signaling bits.

3160-A2-GB22-10 December 1996 Glossary-1