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MM6854/64 Dual Band GSM Data Modem
Issue 1.0 ME 820047
03/00 Page 57
9 GLOSSARY
Abbreviation Meaning
AT Hayes AT modem serial command set
commonly used for land line modems
CI Command Interpreter.
DTE Data Terminal Equipment
DTR Data Terminal Ready
GPS Global Positioning System
GSM Global System Mobile
I/O Input / Output
LED Light Emitting Diode
SIM Subscriber Identity Module
SMS Short Message Service
SMSC Short Message Service Centre