Technical Details
114
Technical Details
The VN170 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).
* 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.
The table on the following page
lists some major CDMA standards.
CDMA Standard Designator Description
Basic Air Interface
TIA/EIA-95A
TSB-74
ANSI J-STD-008
TIA/EIA-IS2000
CDMA Dual-Mode Air Interface
14.4kbps radio link protocol and
inter-band operations
IS-95 adapted for PCS frequency band
CDMA2000 1xRTT Air Interface
Network
TIA/EIA/IS-634
TIA/EIA/IS-651
TIA/EIA/IS-41-C
TIA/EIA/IS-124
MAS-BS
PCSC-RS
Intersystem operations
Non-signaling data comm.
Service
TIA/EIA/IS-96-B
TIA/EIA/IS-637
TIA/EIA/IS-657
IS-801
TIA/EIA/IS-707-A
Speech CODEC
Short Message Service
Packet Data
Position Determination Service (gpsOne)
High Speed Packet Data