ADTRAN 1200063L1, Manual

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Appendix F. Glossary
61200063L1-20 DSU III TDM User Manual F-3
CSA
Canadian Standards Association. The Canadian counterpart to the UL.
CS
See CTS.
CSU
See channel service unit.
CSU loopback
A telco initiated test which loops the CSU portion of the DSU/CSU back to
the telco and allows the telco to test the DDS circuit as well as the CSU por-
tion of the customers DSU/CSU.
CTS
clear to send. A signal on the DTE interface indicating that the DCE is clear
to send data.
data compression
A technique for encoding information so that fewer data bits are required to
represent a given amount of data. Compression facilitates the transmission
of more data for a given amount of transmission time and circuit capacity. It
also reduces the amount of memory required for data storage.
Datamate
An ADTRAN designed and manufactured device that provides a hand-held
means of configuring the SMART 16 shelf. The Datamate plugs into the
front of the controller card and provides a 2x16 LCD display and full
numeric keypad.
data service unit (DSU)
A device designed to transmit and receive digital data on digital transmis-
sion facilities.
dB
decibel. A unit of measure of signal strength, usually the relation between a
transmitted signal and a standard signal source.