ATL Telecom AM64/512 - Manual (Page 19)

GLOS SARY OF TERMS
AIS Alarm In di ca tion Sig nal.
ALT Au to matic Lo cal Test. - Pat tern sent to ap ply a lo cal loop in the DCE.
ART Au to matic Re mote Test. - Pat tern sent to ap ply a loopback on the re mote mo dem.
BBM Base Band Mo dem.
BT Byte Tim ing. - Syn chro ni sa tion to ev ery 8 bits.
CCITT In ter na tional Tele graph and Tele phone Con sul ta tive Com mit tee.
CNR Con trolled Not Ready.
DCE Data Cir cuit-terminating Equip ment.
DTE Data Ter mi nating Equip ment.
EEPROM Elec trically Eraseable Pro gram ma ble Read Only Mem ory.
LCD Liq uid Crys tal Dis play.
LED Light Emitting Di ode.
LTU Line Ter mi nating Unit. Equiv a lent to Base Band Mo dem.
RS-530 High speed 25-position in ter face for DTE and DCE em ploy ing se rial bi nary data inter
change; de vel oped to serve as a com ple ment to EIA-232-D for data rates above 20kbps.
UNR Un con trolled Not Ready.
V.11 CCITT spec i fi ca tion. Elec tri cal char ac ter is tics for bal anced dou ble-current in ter change cir cuits
for gen eral use with in te grated cir cuit equip ment in the field of data com mu ni ca tions.
V.24 CCITT spec i fi ca tion. List of def i ni tions for in ter change cir cuits be tween DTE and DCE.
V.28 CCITT spec i fi ca tion. Elec tri cal char ac ter is tics for un bal anced dou ble-current in ter change
cir cuits (V.28 In ter change cir cuits de fined in V.24).
V.35 CCITT spec i fi ca tion. Data trans mis sion at 48kbit/s us ing 60-108kHz group band cir cuits.
V.36 CCITT spec i fi ca tion. Mo dems for syn chro nous data trans mis sion us ing 60-108kHz group
band cir cuits.
X.21 CCITT spec i fi ca tion. In ter face be tween DTE and DCE for syn chro nous op er a tion on pub lic
data net works.
X.21 bis CCITT spec i fi ca tion. Use on pub lic data net works of DTE which is de signed for in ter fac ing to
syn chro nous V-series mo dems.
X50 Div 2/3 CCITT spec i fi ca tion. Fun da men tal pa ram e ters of a multiplexing scheme for the in ter na tional
in ter face be tween syn chro nous data net works. (80 and 20 bit pat terns).
2B1Q Line code for 2 bi nary bits to one Qua ter nary (4 level) sym bol.
3B10 Line code for 3 bi nary bits to one Oc tal (8 level) sym bol.
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ascom
telecom User Guide High Speed Mo dems