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Technical Details
The VX3100 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.
C D M A 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
i n t e r r u p t i o n s .
The Cellular and PCS CDMAnetworks 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
C D M As t a n d a r d s .
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