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VX5400 9
Important Information
This user’s guide provides important
information on the use and operation
of your phone. Please read this guide
carefully prior to using the phone to
be able to use your phone to its
greatest advantage and to prevent
any accidental damage or misuse.
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.
Technical Details
The VX5400 is a tri-mode 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).
* 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.
The following table lists some major
CDMA standards.
Technical Details