Sierra Wireless AirCard 580 User's Guide download pdf (Page 115)

Glossary 107

Glossary

One Times Radio Transmission Technology (the “one times” refers to the frequency

spectrum). Supports Internet connections with data rates up to 153.6 kbps

(downlink from the network) and 76.8 kbps (uplink to the network). Actual speed

depends on the network conditions. Compare to 1xEV-DO.

1xEV-DO

A high-speed standard for cellular packet data communications. Supports Internet

connections with data rates up to 2.4 Mbps (downlink from the network) and

153.6 kbps (uplink to the network). Average data rates are roughly 700 kbps

(downlink from the network) and 153.6 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 communications 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.

dBm

decibels relative to 1 milliwatt

dormant

The network switches the Sprint PCS Vision data connection into dormant mode if

there is no traffic on the connection for some time. When you resume data traffic,

the high-speed data connection becomes active.

ESN

Electronic Serial Number—The unique serial number assigned to the modem for

cellular network use. The ESN is on the label on the card, and is also displayed in

the Device Info & Diagnostics window (page 64).

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Sierra Wireless AirCard 580 User's Guide Page 115