Welcome

Welcome

CDMA technology uses a feature called DSSS (Direct Sequence Spread Spectrum) that enables the phone to keep communication from being crossed and to use one frequency channel by multiple users in the same specific area. This results in a 10-fold capacity increase when compared with analog mode. In addition, features such as soft / softer handoff, hard Handoff, and dynamic RF power control technologies combine to reduce call interruptions.

The Cellular and PCS CDMA networks consist of MSO (Mobile Switching Office), BSC (Base Station Controller), BTS (Base Station Transmission System), and MS (Mobile Station). The following table lists some major CDMA standards.

*TSB-74: Protocol between an IS-95A system and ANSI J-STD-008

1xRTT system receives twice as many subscribers in the wireless section as IS-95. Its battery life is twice as long as IS-95. High-speed data transmission is also possible.

CDMA Standard Designator

Description

ANSI J-STD-008 IS-95 adapted for PCS

Basic Airfrequency band

Interface

TIA/EIA-IS2000 cdma2000 1xRTT AirInterface

 

TIA/EIA/IS-634

MAS-BS

Network

TIA/EIA/IS/651

PCSC-RS

 

TIA/EIA/IS-41-C

Intersystem operations

 

TIA/EIA/IS-124

Non-signaling data comm.

 

 

 

 

TIA/EIA/IS-96-B

Speech CODEC

 

Short message service

Service

TIA/EIA/IS-637

Packet Data

 

TIA/EIA/IS-657

 

Position Determination

 

IS-801

 

Service (gpsOne)

 

 

 

 

 

 

TIA/EIA/IS-97

Cellular base station

 

TIA/EIA/IS-98

Cellular mobile station

Performance

ANSI J-STD-018

PCS personal station

ANSI J-STD-019

PCS base station

 

 

TIA/EIA/IS-125

Speech CODEC

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LG Electronics LX140 Welcome, TSB-74 Protocol between an IS-95A system and Ansi J-STD-008, Interface, Network, Service