Document 2130948. Rev 1.0 Jan.08
43
A
Appendix A: Glossary
1X
One
Times
Radio
Transmission
Technology
(the
ʺ
one
times
ʺ
refers
to
the
frequency
spectrum).
Supports
Internet
connections
with
data
rates
up
to
153
.
Actual
speed
depends
on
the
network
conditions.
Compare
to
1x-EVDO
A
high
‐
speed
standard
for
cellular
data
communica
‐
tions.
Rev.
A
supports
Internet
connections
with
data
rates
up
to
3.1
(downlink
from
the
network)
and
1.8 Mbps
(uplink
to
the
network).
Rev.
0
supports
Internet
connections
with
data
rates
up
to
2.4
(downlink
from
the
network)
and
153
(uplink
to
the
network).
Average
data
rates
are:
for
Rev.
A:
450–800 Kbps
(downlink
from
the
network)
and
300–400 Kbps
(uplink
to
the
network);
for
Rev.
0:
400
‐
700 Kbps
(downlink
from
the
network)
and
40
‐
80 Kbps
(uplink
to
the
network).
Actual
speed
depends
on
the
network
conditions.
Compare
to
.
bps
bits
per
second—The
actual
data
speed
over
the
transmission
medium.
CDMA
Code
Division
Multiple
Access—A
wideband
spread
spectrum
technique
used
in
digital
cellular,
personal
communications
services,
and
other
wireless
networks.
Wide
channels
(1.25
are
obtained
through
spread
spectrum
transmis
‐
sions,
thus
allowing
many
active
users
to
share
the
same
channel.
Each
user
is
assigned
a
unique
digital
code,
which
differentiates
the
individual
conversations
on
the
same
channel.
CDMA 1X
Also
known
as
,
this
is
a
high
‐
speed
standard
for
cellular
communications.
dormant
The
data
connection
has
the
logical
PPP
session
left
open
while
the
underlying
physical
link
(the
radio
channel)
is
released.
When
traffic
is
to
resume,
a
radio
channel
is
re
‐
acquired
and
the
original
PPP
session
resumes.
ESN
Electronic
Serial
Number—The
unique
first
‐
generation
serial
number
assigned
to
the
Compass
USB
modem
for
cellular
network
use.
Compare
to
.
ExpressCard™
Add
‐
in
memory
and
communications
cards
for
portable
computers.
ExpressCard
is
a
trademark
of
the
.
Содержание Compass 597
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