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HUAWEI MG323 GSM M2M Module
Hardware Guide
Appendix B Acronyms and Abbreviations
Issue 04 (2011-08-22)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
51
Acronym or Abbreviation
Expansion
NTC
Negative Temperature Coefficient
PBCCH
Packet Broadcast Control Channel
PCB
Printed Circuit Board
PDU
Protocol Data Unit
RF
Radio Frequency
RoHS
Restriction of the Use of Certain Hazardous
Substances
RTC
Real-time Clock
SIM
Subscriber Identity Module
TTL
Transistor-transistor Logic
TVS
Transient Voltage Suppressor
UART
Universal Asynchronous Receiver-transmitter
VSWR
Voltage Standing Wave Ratio