American Telecom AM64/128A - Manual (Page 37)

AM64/128A User Manual Glossary
37
GLOSSARY OF TERMS
AIS Alarm Indication Signal.
ALT Automatic Local Test. - Pattern sent to apply a local loop in the DCE.
AMI Alternate Mark Inversion. - Code used for line transmission.
ART Automatic Remote Test. - Pattern sent to apply a loopback on the remote modem.
BBM Baseband Modem.
BT Byte Timing. - Synchronisation to every 8 bits.
CNR Controlled Not Ready
DC Direct Current
DCE Data Circuit-terminating Equipment.
DSP Digital Signal Processor.
DTE Data Terminating Equipment.
EEPROM Electrically Eraseable Programmable Read Only Memory.
EMC Electromagnetic Compatibility.
G.703 ITU-T Recmmendation for physical and electrical characteristics of hierarchical digital
interfaces. used for 64Kbps and E1/T1. Whereby data and its associated timing are
transmitted in the same direction. (120, 4Kbps Codirectional)
ITU-T International Telecommunications Union - Telecoms.
LCD Liquid Crystal Display
LED Light Emitting Diode.
LTU Line Terminating Unit. Equivalent to Baseband Modem.
PTO Public Telephone Operator.
RS-530 High speed 25-position interface for DTE and DCE employing serial binary data
interchange; developed to serve as a complement to EIA-232-D for data rates above
20kbps.
SEXT External Signal Element Timing.
UNR Uncontrolled Not Ready.
V.10 ITU-T Electrical Characteristics for unbalanced double current interchange circuits for general
use with integrated circuit equipment in the field of data communications.
V.11 CCITT specification. Electrical characteristics for balanced double-current interchange
circuits for general use with integrated circuit equipment in the field of data
communications.