Subject
The phone has been designed to operate on the latest digital mobile
communication technology, Code Division Multiple Access (CDMA).
This CDMA digital technology has greatly enhanced voice clarity and can
provide a variety of advanced features. Currently, CDMA mobile communication
technology has been commercially used in Cellular and Personal Communication
Service (PCS). The difference between them is the operating frequency spectrum.
Cellular uses 800 MHz and PCS uses 1.9 GHz. The VX9000 also works on
Advanced Mobile Phone Service (AMPS). We call it a tri-mode phone.
If one of the Cellular, PCS, or AMPS base stations is located nearby, the call fail
rate of the tri-mode phone is less than a dual-mode phone or a single-mode
phone.
The CDMA technology adopts DSSS (Direct Sequence Spread Spectrum).
DSSS enables the phone to keep communication discreet and allows one
frequency channel to be used by multiple users in the same specific area. This
results in an increase of capacity by 10 times, compared to the analog mode
currently used. Soft/Softer Handoff, Hard Handoff, and Dynamic RF power
Control technologies are combined into this phone to reduce the call’s being
interrupted in a middle of a call.
Содержание VX9000
Страница 1: ...V X 9 0 0 0 U s e r G u i d e M M B B 0 0 3 6 7 0 1 User Guide 1 1 ...
Страница 7: ......
Страница 17: ......
Страница 27: ......
Страница 37: ......
Страница 41: ......
Страница 45: ......
Страница 71: ......
Страница 89: ......
Страница 109: ......
Страница 133: ......
Страница 136: ......
Страница 137: ...M M B B 0 0 3 6 7 0 1 1 0 ...
Страница 143: ......
Страница 163: ......
Страница 173: ......
Страница 177: ......
Страница 181: ......
Страница 207: ......
Страница 225: ......
Страница 245: ......
Страница 271: ......
Страница 274: ......