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

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Installation of a driver
FX-DS110-PCC
17
Constructing a network
Given below are the guidelines and notes on constructing a network:
(1) The operating distance of the FX-DS110-PCC between the AP
and user unit is about 150 m in indoor space with no obstacle
or about 50 m in indoor space with few obstacles.
(2) This product enables communication via a total of 11(FCC
model) or 13(CE model) channels from channels 1 to 11 or 13.
Channels selected at intervals of five consecutive channels can
be used for communication without mutual radio interference
(except channel 11). When more than one channel is used,
radio waves can be utilized most efficiently using channels 1, 6,
and 11.
(3) The operation mode and software settings such as ESS ID must
be selected depending on the operation form. (See Chapter 5.)
(4) The operating range for communication with another terminal
is about 50 m in indoor space free of radio wave attenuation
caused by an obstacle or radio interference, covering almost
the entire area of small- and medium-scale offices and plants.
Note, however, that extending the communication distance
beyond a certain degree increases the number of transmission
and reception errors.
(5) When installing the PC Card, use the FLEXLAN-DS110 utility
to check the RSSI value. In general, a remote party’s RSSI
value of 70 or more assures stable communication. Even
when the RSSI value is 70 or more, however, communication
may not be stable, due to multipath for example, depending on
the operating environment. Communication cannot be
performed normally when the RSSI value is 50 or less.
After checking the RSSI value, run some applications that you
usually use to check whether actual communication can be
performed. In the TCP/I environment, for example, you can
use PING in Windows. To ping, invoke the MS-DOS prompt
and enter the PING command as shown below. In this
example, the IP address of the target AP is 10.168.132.15.
C:\>ping 10.168.132.15
(6) Wireless terminals placed near to each other may fail to
communicate with each other because of mutual interference.
Allow a minimum spacing of 1 m between user units and that