ADTRAN DSU III ARdc Manual page 122

Appendix F. Glossary
dB
Decibel. A unit of measure of signal strength, usually the relation
between a transmitted signal and a standard signal source.
DTE to loop rate matching
A feature designed into ADTRAN DSU/CSU products that allows
slower DTE devices to communicate over 56/64 kbps digital circuits.
DTR
Data terminal ready. A control signal sent from the DTE to the DCE
that indicates the DTE is powered on and ready to communicate.
EIA-232
A set of standards specifying various electrical and mechanical char-
acteristics for interfaces between computers, terminals, and modems.
Defines the mechanical and electrical characteristics for connecting
DTE and DCE data communications devices. It defines what the
interface does, circuit functions, and their corresponding connector
pin assignments. The standard applies to both synchronous and
asynchronous binary data transmission.
EIA-366
An EIA interface standard for autodialing.
FCC part 15 of class A
Radiated and conducted emissions standards set for commercial and
industrial use.
FCC part 15 of class B
Radiated and conducted emissions standards set for residential use.
FCC part 68
FCC Rules and regulations intended to provide protection of the tele-
phone network from harm caused by connection of equipment to the
network.
full duplex
A circuit designed to transmit and receive data simultaneously.
F-4 DSU III ARdc User Manual 61200270L1-20