Technical Details - LG TM250 Guide D'utilisation

Technical D D etails
The TM250 is a dual-band phone that operates on both
Code Division Multiple Access (CDMA) frequencies:
cellular services at 800
Communication Services (PCS) at 1.9 Ghz.
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.
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LG-TM250
MHz, and Personal
CDMA Standard Designator
TIA/EIA-95A
TSB-74
Basic Air Interface
ANSI J-STD-008
TIA/EIA-IS2000
TIA/EIA/IS-634
TIA/EIA/IS/651
Network
TIA/EIA/IS-41-C
TIA/EIA/IS-124
TIA/EIA/IS-96-B
TIA/EIA/IS-99
Service
TIA/EIA/IS-637
TIA/EIA/IS-657
IS-801
TIA/EIA/IS-97
TIA/EIA/IS-98
Performance
ANSI J-STD-018
ANSI J-STD-019
TIA/EIA/IS-125
* 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. High-speed data transmission is also possible.
LG-TM250
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
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