Toshiba GN-1040 Operator's Manual page 49

2. Appendix
Roaming
This term has the same meaning as roaming for a portable phone or PHS. The AP is in
the role commonly called the "antenna/base station" for the phone or PHS, and the user
unit is in the role of the phone itself.
Router
A device for relaying between LAN's. The router determines data addresses by the
combination of a network address assigned to the network and an individual computer
address. Used particularly in medium-scale and larger LAN systems with very large
number of clients, to reduce traffic (congestion) on communication lines.
RSSI (Receive Signal Strength Indication)
A numeric indicator of incoming signal strength.
RTS (Request To Send)
In communication via AP, transmission is controlled by CSMA/CA plus RTS. In RTS, a
wireless terminal asks the AP if it is able to transmit, and only transmits after an OK-to-
send acknowledgement signal is returned. This serves to avoid unnecessary collisions
when hidden terminals exist because hidden terminals cannot transmit.
Spectrum Diffusion Transmission
A method of transmission in which signals that are normally transmitted over a given
limited frequency band undergo narrow band modulation (primary modulation), then
again diffuse modulation (secondary modulation) to intentionally diffuse the signal over
a broad frequency spectrum.
GN-1040 Operator's Manual — Glossary 49