Multi-Tech Systems CDMA Wireless Modem manual Definitions

Chapter 1 - Introduction

Definitions

This is an alphabetical list of terms and acronyms used throughout this document and the CDMA cellular industry.

2G:	Second Generation. All digital cellular systems developed to replace the first analog cellular
	systems. )GSN and CDMA).
3G:	Third Generation. Next generation digital cellular systems designed to have high-speed data
	access and higher voice capacity (W CDNA & CDNA2000).
CBM:	Cell Broadcast Message. Ah SMS message that is broadcast to all mobiles on the network
CDMA:	Code Division Multiple Access. CDMA is a spread spectrum, digital wireless modulation
	scheme for cellular communications systems. It has approximately 3 times the voice
	capacity of GSM networks. Se IS-95, IS-95B, IS-2000.
CDMA2000:	See IS-2000.
DCE:	Data Communications Equipment. This is the modem in the traditional serial communication
	paradigm of a computer connected via two modems to another computer.
DTE:	Data Terminal Equipment. This is the computer in the traditional serial communication
	paradigm of a computer connected via two modems to another computer.
DTMF:	Dual Tone Multi-Frequency: A pre-defined set of tones sent over the air when keys are
	pressed on the keypad.

Handset (Path): The audio path (microphone & speaker) that connects to a traditional hand held telephone receiver, usually dual balanced electrical lines.

Headset (Path): The audio path (microphone & speaker) that connects to an earpiece with a microphone,

	usually single electrical lines.
IMSI:	International Mobile Station IS. This is an international 15 digital phone number that uniquely
	identifies a mobile. IMSI=MCC + MNC + MIN.
IOTA:	Internet Over The Air.
IS-95:	The first CDMA standard published by Qualcomm in 1993.
IS-95A:	A CDMA standard with improved voice quality. This standard is widely used throughout the
	world.
IS-95B:	This CDMA standard contains Medium Data Rate capabilities and bug fixes for system
	access failures. It is considered a 2.5G system. This standard is mostly deployed in Korea.
IS-2000:	The first 3G CDMA standard based on IS-95B. It contains a significant increase in voice
	capacity and high-speed data rates. It is backward compatible with IS-95B and IS-95A. The
	DCMA is IS-2000 compatible.
IS-707:	TIA/EIA/IS-707 describes data services available on wideband spread spectrum systems. It
	is organized into a series of related recommendations, some of which address functions
	common to all CDMA data services and others that describe a specific data service.
MCC:	Mobile Country Code. A pre-defined 30-digital number that represents a country in the IMSI.
MIN:	Mobile IS Number: The traditional 10 digit phone number of the mobile.
MNC:	Mobile Network Code. A pre-defined 2-digital number that represents a sub-network in the
	IMSI (usually set to “00”).
MO:	Mobile Originated. An action (usually a call) that is first started from the phone. An outgoing
	call or SMS>
MS:	Mobile Station. The term MS is commonly used to represent the phone or mobile.
MT:	Mobile Terminated: An action usually a call) that is first started from a land based network.
	An incoming call or SMS.
MSM:	Mobile Station Modem. This is the main processing ASIC for a CDMA phone.
NAM:	Number Assignment Modem. The NAM is collection of internal parameters that define a
	working phone for a given network (phone number, access parameters, etc.).
NID:	Network ID. The NID is an identification number that represents geographic location of a
	common coverage area; but is a subset of the SID, usually a neighborhood in a large city.
	NID is usually not used and is set to zero. Also se SID
NV-RAM:	Non-Volatile Random Access Memory, NV-RAM is a data storage device that does not lose
	it’s data when power is turned off.
OTAPA:	Over The Air Parameter Administration. An automatic update in internal software parameters
	(PRL for example) by means of a specially defined CDMA data call that is mobile terminated
	(MT).

Multi-Tech Systems, Inc. CDMA Wireless AT Commands - PN S000294C 12