User's Guide

MC55i-W Hardware Interface Overview
1.2 Terms and Abbreviations
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MC55i-W_HIO_v01.301 Page 9 of 30 2011-3-8
Confidential / Released
PDU Protocol Data Unit
PLL Phase Locked Loop
PPP Point-to-point protocol
PSU Power Supply Unit
R&TTE Radio and Telecommunication Terminal Equipment
RAM Random Access Memory
RF Radio Frequency
RMS Root Mean Square (value)
ROM Read-only Memory
RTC Real Time Clock
Rx Receive Direction
SAR Specific Absorption Rate
SELV Safety Extra Low Voltage
SIM card Subscriber Identification Module card; specifies a UICC with SIM application
SMS Short Message Service
SRAM Static Random Access Memory
TA Terminal adapter (e.g. GSM module)
TDMA Time Division Multiple Access
TE Terminal Equipment, also referred to as DTE
Tx Transmit Direction
UART Universal asynchronous receiver-transmitter
UICC USIM Integrated Circuit Card
UMTS Universal Mobile Telecommunications System
URC Unsolicited Result Code
USIM UMTS Subscriber Identification Module
USSD Unstructured Supplementary Service Data
VSWR Voltage Standing Wave Ratio
Phonebook abbreviations
FD SIM fixdialing phonebook
LD SIM last dialling phonebook (list of numbers most recently dialled)
MC Mobile Equipment list of unanswered MT calls (missed calls)
ME Mobile Equipment phonebook
ON Own numbers (MSISDNs) stored on SIM or ME
RC Mobile Equipment list of received calls
SM SIM phonebook
Abbreviation Description