Specifications

Chapter 9 – SocketModem CDMA (MTSMC-C)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342F) 129
CDMA Terminology and Acronymns
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).
CBM Cell Broadcast Message. This is an SMS message that is broadcast to all mobiles on the
network.
CDMA 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. 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
wireless 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
wireless system.
cdma2000 cdma2000 is a third generation (3G) wireless 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.
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 stands for Internet Over The Air.
IS-95 IS-95 is the first CDMA standard published by Qualcomm in 1993. It is a TIA standard for
North American cellular systems based on CDMA. It is widely deployed in North America
and Asia.
IS-95A IS-95A is a CDMA standard with improved voice quality. IS-95A defines what generally is
known as cdmaOne, which supports voice and 14.4 Kbps data rates.This standard is
widely used throughout the world.
IS-95B IS-95B is a CDMA standard contains Medium Data Rate capabilities and bug fixes for
system access failures. It is considered a 2.5G system. It supports data rates up to 115
Kbps.
IS-2000 IS-2000 is 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.
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 is a pre-defined 30-digital number that represents a country in the
IMSI.
MDN MDN stands for Mobile Data Number or the mobile phone number.
MIN MIN stands for Mobile Identification Number or mobile user account number.
MNC MNC stands for Mobile Network Code, a pre-defined 2-digital number that represents a
sub-network in the IMSI (usually set to “00”).
MO MO stands for Mobile Originated, an action (usually a call) that is first started from the
phone. An outgoing call or SMS.
MS MS stands for Mobile Station. The term MS is commonly used to represent the phone or
mobile.
MT MT stands for Mobile Terminated. MT is an action, usually a call, that is first started from a
land based network. An incoming call or SMS.
MSM MSM stands for Mobile Station Modem.