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LG-TM250
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LG-TM250
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CDMA Standard
Basic Air Interface
TIA/EIA-95A
TSB-74
ANSI J-STD-008
TIA/EIA-IS2000
CDMA Dual-Mode Air Interface
14.4kbps radio link protocol and
inter-band operations
IS-95 adapted for PCS frequency
band cdma2000 1xRTTAir 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
TIA/EIA/IS-634
TIA/EIA/IS/651
TIA/EIA/IS-41-C
TIA/EIA/IS-124
TIA/EIA/IS-97
TIA/EIA/IS-98
ANSI J-STD-018
ANSI J-STD-019
TIA/EIA/IS-125
TIA/EIA/IS-96-B
TIA/EIA/IS-99
TIA/EIA/IS-637
TIA/EIA/IS-657
IS-801
Network
Service
Performance
Designator Description
*
TSB -74: Protocol between an IS-95Asystem 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.
Technical
Details
The TM250 is a dual-band phone that operates on both
Code Division Multiple Access (CDMA) frequencies:
cellular services at 800 MHz, and Personal
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.
G
ETTING
S
TARTED
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