Paradyne 7520 User Manual page 69

Glossary
aggregate
ASCII
asynchronous
ATI
AUX port
BPV
CCA
CCITT
CD
channel
CMI
COM port
configuration option
CPE
crossed pairs
CSU
CTS
dB
DCE
DDS
DM
DMI
7520-A2-GB20-20
A single bit stream that combines two or more bit streams.
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.
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.
Asynchronous terminal interface. This feature allows a device to be controlled from an
async (asynchronous) terminal like an ASCII (VT100-compatible) terminal.
The auxiliary communications port on a router.
Bipolar Violation. A modified bipolar signaling method in which a control code is inserted.
Circuit Card Assembly. A printed circuit board to which separate components are attached.
Consultative Committee on International Telegraphy and Telephony. See ITU.
Carrier Detect. A signal indicating that energy exists on the transmission circuit.
Associated with Pin 8 on an EIA-232 interface.
An independent data path.
Control Mode Idle. A control signal sent over the DDS line to indicate that no data is being
sent.
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.
Device software that sets specific operating parameters for the DSU.
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).
When the DDS receive and transmit pairs are crossed, a facility alarm is generated.
Channel Service Unit. The function of the DSU that protects the line from damage and
regenerates the signal.
Clear To Send. A signal indicating that the device is ready for the DTE to transmit data.
Usually occurs in response to Request To Send (RTS).
Decibel. A unit expressing the relative power of a signal.
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.
Digital Data Service. Provides digital communication circuits.
Data Mode.
Data Mode Idle. Refers to a sequence of ones transmitted or received on the DDS
network.
May 1998
GL-1