Contec Flexlan PC Card FX-DS-110, Руководство пользователя

Страница: 49 / 52

Appendix
FX-DS110-PCC
42
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 all right
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.
RSSI (Receive Signal Strength Indication)
A numeric indicator of incoming signal strength.
ESS ID (Extended Service Set ID)
In the FLEXLAN DS110 series, the ESS ID is like a name assigned
to the wireless LAN network to which a unit belongs. The same
name must not be given to more than one wireless terminal.
Conversely, a wireless network can be partitioned by using different
ESS ID names.
Channel
This term has the same meaning as a television or radio channel.
In the ISM band used by this product, the IEEE 802.11 standard
provides for division into 11(FCC model) or 13(CE model).
channels numbered 1 to 11 or 13. Even on the same network,
wireless devices operating on different channels cannot
communicate with each other.
Multipath
Multiple versions of a radio wave emitted to be used for
communication, which are received after being reflected by
buildings and walls. Some of them are received after being
reflected several times repeatedly. A strong multipath effect
results in distortion of the signal in the directly received radio wave,
degrading the communication quality and disabling stable
communication