Multitech MultiModem Cell MTCBA-C1 User's Guide download pdf (Page 128)

Chapter 22 – CDMA Terminology and Acronyms

Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide (PN S000478C) 128

Chapter 22 – CDMA

Terminology and Acronyms

This is an alphabetical list of the CDMA cellular industry’s terminology and acronyms.

2G Second Generation. This is an all digital cellular systems developed to replace the first

analog cellular systems. (GSM and CDMA).

3G Third Generation. This is the next generation digital cellular systems designed to have

high-speed data access and higher voice capacity (CDMA & CDMA2000).

AFLT Advanced Forward Link Trilateration. A type of handset-based position location

technology. GPS satellites are not used to determine location. To determine location

using AFLT, the phone takes measurements of signals from nearby cellular base stations

(towers) and reports the time/distance readings back to the network, which are then used

to triangulate an approximate location of the handset. In general, at least three

surrounding base stations are required to get an optimal position fix.

CDMA CDMA (Code Division Multiple Access). CDMA is a spread spectrum, digital cellular

modulation scheme for cellular communications systems. It has approximately 3 times

the voice capacity of GSM networks. See IS-95, IS-95B, IS-2000.

cdmaONE cdmaOne is a brand name, trademarked and reserved for the exclusive use of the

CDMA Development Group (see their Web site at cdg.org). cdmaOne describes a

complete cellular system that incorporates the IS-95 CDMA air interface, the ANSI-41

network standard for switch interconnection and many other standards that make up a

complete cellular system.

cdma2000 cdma2000 is a third generation (3G) cellular system. It contains a significant increase in

voice capacity and high-speed data rates. It is backward compatible with IS-95B and IS-

95A.

cdma2000 1xRTT "1xRTT" stands for 1 times Radio Transmission Technology and is used to identify the

version of CDMA2000 radio technology that operates in a pair of 1.25-MHz radio

channels (one times 1.25 MHz, as opposed to three times 1.25 MHz in 3xRTT). Although

theoretically capable of higher data rates, most carrier implementations have limited the

peak data rate to 144 kbit/s. While 1xRTT officially qualifies as 3G technology, 1xRTT is

considered by some to be a 2.5G.

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.

ESN "ESN" stands for Electronic Serial Number. It is a 32-bit binary number that identifies

each cellular phone.

Handset (Path) Handset (Path). This is the audio path (microphone & speaker) that connects to a

traditional hand held telephone receiver, usually dual balanced electrical lines.

Headset (Path) Headset (Path). This is 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 IOTA s

tands for Internet Over The Air.

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Multitech MultiModem Cell MTCBA-C1 User's Guide Page 128

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