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Idiomas disponibles
T T e e c c h h n n i i c c a a l l D D e e t t a a i i l l s s
TheAX5450 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.
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AX5450
CDMA Standard
Basic Air Interface
Network
Performance
* 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.
Designator
CDMA Dual-Mode Air Interface
TIA/EIA-95A
14.4kbps radio link protocol and
TSB-74
inter-band operations
ANSI J-STD-008
IS-95 adapted for PCS
TIA/EIA-IS2000
frequency band cdma2000 1xRTT
Air Interface
TIA/EIA/IS-634
MAS-BS
TIA/EIA/IS/651
PCSC-RS
TIA/EIA/IS-41-C
Intersystem operations
TIA/EIA/IS-124
Nom-signaling data comm.
TIA/EIA/IS-96-B
Speech CODEC
Assign data and fax
TIA/EIA/IS-99
Service
Short message service
TIA/EIA/IS-637
Packet data
TIA/EIA/IS-657
Position Determination
Service (gpsOne)
IS-801
TIA/EIA/IS-97
TIA/EIA/IS-98
ANSI J-STD-018
ANSI J-STD-019
TIA/EIA/IS-125
AX5450
Description
Cellular base station
Cellular mobile station
PCS personal station
PCS base station
Speech CODEC
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