LG VX5200 Посібник користувача - Сторінка 4

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LG VX5200 Посібник користувача
SUBJECT
The VX5200 phone has been designed to operate on the latest digital mobile communication
technology, Code Division Multiple Access (CDMA). This CDMA digital technology has greatly
enhanced voice clarity and can provide a variety of advanced features. Currently, CDMA mobile
communication technology has been commercially used in Cellular and Personal
Communication Service (PCS). The difference between them is the operating frequency
spectrum. Cellular uses 800MHz and PCS uses 1.9GHz. The VX5200 can operate on 1.9GHz
or 800 MHz frequency, we usually call it dual-band phone. Also, VX5200 works on Advanced
Mobile Phone Service (AMPS). We call it Tri -mode phone. This phone is the one of tri band
Quad mode - 800Mhz CDMA, 1900Mhz PCS, 1500Mhz GPS.
The CDMA technology adopts DSSS (Direct Sequence Spread Spectrum). This feature of
DSSS enables the phone to keep communication from being crossed and to use one frequency
channel by multiple users in the same specific area, resulting that it increases the capacity 10
times more compared with that in the analog mode currently used. Soft/Softer Handoff, Hard
Handoff, and Dynamic RF power Control technologies are combined into this phone to reduce
the call being interrupted in a middle of talking over the phone.
Cellular and PCS CDMA network consists 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.
CDMA Standard
Basic air interface
Network
Service
Performance
Designator
TIA/EIA-95A
TSB-74
ANSI J-STD-008
TIA/EIA-IS2000
TIA/EIA/IS-634
TIA/EIA/IS/651
TIA/EIA/IS-41-C
TIA/EIA/IS-124
TIA/EIA/IS-96-B
TIA/EIA/IS-99
TIA/EIA/IS-637
TIA/EIA/IS-657
IS-801
TIA/EIA/IS-97
TIA/EIA/IS-98
ANSI J-STD-018
ANSI J-STD-019
TIA/EIA/IS-125
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Description
CDMA Dual-Mode Air Interface 14.4kbps radio link
protocol and inter-band operations IS-95 adapted for
PCS frequency band cdma2000 1xRTT Air Interface
MAS-BS
PCSC-RS
Intersystem operations
Nom-signaling data comm.
Speech CODEC
Assign data and fax
Short message service
Packet data
Position Determination Service (gpsOne)
Cellular base station
Cellular mobile station
PCS personal station
PCS base station
Speech CODEC