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UX840_Eng_ver1.1_090723.qxd
Technical Details
Important Information
This user's guide provides
important information on the use
and operation of your phone.
Please read all the information
carefully prior to using the
phone for the best performance
and to prevent any damage to or
misuse of the phone. Any
unapproved changes or
modifications will void your
warranty.
FCC Part 15 Class B
Compliance
This device and its accessories
comply with part 15 of FCC rules.
Operation is subject to the
following two conditions: (1) This
device and its accessories may not
cause harmful interference, and
(2) this device and its accessories
must accept any interference
received, including interference
that causes undesired operation.
10
7/23/09
11:07 AM
Technical Details
The
is an all digital
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).
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