Nortel 6220, Руководство пользователя, Страница: 69 / 178

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WLAN Cable Access Point 6220 CSU NTPM99CA Rel 2.0 Issue 5 Dec 2005
Transmit Rate
11 Mbps
5.5 Mbps
2 Mbps
1 Mbps
Transmit Power Antenna Gain
Maximum
50%
25%
12.5% Maximum allowable antenna
- Omni-directional: 7dBi
- Bi-directional: 9dBi
- Flat panel : 14dBi
Caution
:
Do not use any other antennas exceeding the allowed
maximum gain per each antenna type in case you select 802.11b/g mode.
For example, if you are intended to use omni-directional antenna for
APU, it is illegal that you use a similar type of antenna with 14dBi even
though the max allowable antenna is up to 14dBi.
Make sure that a gain per antenna type does not exceed the certified
value.
Note:
It is recommended that you set the transmit power to “Maximum”
as the antennas listed in Appendix C(Antenna) have been designed to
meet FCC regulation specifying the maximum allowable EIRP at the
maximum transmit power.
24.
Select the Network ID in Network Settings referring to Appendix G
“Wireless Network Planning."
Note:
the Secure Data Mode network ID number (0-15) is used to
differentiate between multiple Secure Data Mode stations using the same
System Access Pass Phrase. This is used to allow a Secure Data Mode
CSU to specify the APU mode unit that it wants to connect to if two
APU mode units can be seen by the same CSU. Generally, this value
should be the same as the Channel Number.
Note: The channel/frequency values are usually determined by network
administrators. If you set the channel and frequency in 802.11b/g, ensure
that there are at least four numerical channel differences between two
overlapping cells to avoid interference. For example, channels 1, 6 and
11 don’t overlap, but channels 1 and 3 do.
In the other side, if you are intended to use 802.11a, please keep in mind
that all channels (4 channels) with 20MHz bandwidth are not permitted
to be overlapped with each channels in the frequency plan.