Glossary - Sierra Wireless 595 User Manual

Appendix A: Glossary A
1X
One Times Radio Transmission Technology (the ʺone timesʺ
refers to the frequency spectrum). Supports Internet connec‐
tions with data rates up to 153 Kbps. Actual speed depends on
the network conditions. Compare to 1x‐EVDO.
1x-EVDO
A high‐speed standard for cellular packet data communica‐
tions.
Rev. A supports Internet connections with data rates up to
3.1 Mbps (downlink from the network) and 1.8 Mbps (uplink
to the network).
Rev. 0 supports Internet connections with data rates up to
2.4 Mbps (downlink from the network) and 153 Kbps (uplink
to the network).
Average data rates are roughly: for Rev. A: 600–1300 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
1X.
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 commu‐
nications services, and other wireless networks. Wide
channels (1.25 MHz) are obtained through spread spectrum
transmissions, 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 1X, this is a high‐speed standard for CDMA
cellular communications.
circuit switched cellular
V.xx modem communications over a cellular network. It uses
a dedicated connection circuit, in contrast to packet‐switched.
The user is charged by the carrier for the duration of the
connection.
dormant
The packet 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‐
aquired and the original PPP session resumes.
Document 2130681. Rev 1.0 Aug.06 36