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PD820
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
The PD820 is a single-band phone that operates on
Code Division Multiple Access (CDMA) frequencies:
cellular services at 800 MHz.
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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