Filter
Top Products
8
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
Basic Air
Interface
ANSI J-STD-008
TIA/EIA-IS2000
IS-95 adapted for PCS
frequency band
cdma2000 1xRTT AirInterface
MAS-BS
PCSC-RS
Intersystem operations
Non-signaling data comm.
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-637
TIA/EIA/IS-657
IS-801
Speech CODEC
Short message service
Packet Data
Position Determination
Service (gpsOne)
Network
Service
Performance
Designator Description
LX140_Virgin_Eng.qxd 7/3/07 9:04 AM Page 8