User's Manual

Table Of Contents
Fortress ES-Series CLI Guide: Networking and Radio Configuration
48
3.4.2 Channel Selection
The ChannelToUse setting selects the portion of the radio
spectrum the radio will to use to transmit and receive—in order
to provide wireless LAN access or to establish the initial
connections in a mesh network.
NOTE: Consult
your local regula-
tory authority for appli-
cable radio device and
transmission rules and
for DFS channel desig-
nations.
The channels available for user selection are determined by
the frequency band the radio uses, subject to the relevant
regulatory domain rules. In most regulatory domains, certain
channels in the 5 GHz frequency band are designated DFS
(Dynamic Frequency Selection) channels. DFS compliance
also restricts the channels available for user selection (and
broadcast) on 802.11a radios.
Without a
Channel license installed (refer to Section 5.6),
5 GHz-band Unlicensed National Information Infrastructure
(UNII) 2 extended channels
116, 132 and 136 are also
unavailable for selection. These channels are restricted by the
FCC requirement for a 30MHz guard band around Terminal
Doppler Weather Radar (TDWR) operating within 35km (refer
to Section 3.4.8.2).
NOTE: Where
2.4GHz 802.11g
channels power levels
are restricted (e.g. the
EU countries), Fortress
radios which cannot
effectively comply will
disable the 802.11g
channels. The default in
that situation is band
802.11a and channel
100.
A dual-band radio that uses the 2.4 GHz 802.11g band by
default ((Radio 1 in all multiple-radio Mesh Points)) is set to
channel
1 by default.
The second internal radio in multiple-radio Mesh Points (the
5 GHz 802.11a Radio 2 in the standard model ES2440, ES820
and ES520) and a dual-band radio that uses 802.11a by default
(the single Radio 1 in the ES210) has a default channel setting
of:
149, when the Mesh Point is licensed for standard United
States operation (the default).
20, when the Mesh Point is licensed for United States
Public Safety operation.
C1, when the Mesh Point is equipped with 4.4 GHz band
radios.
Radio 3 and Radio 4 in an ES2440-3555 are set by default to
channels:
157 and 165, respectively, when the Mesh Point is licensed
for standard United States operation (the default).
40 and 60, respectively, when the Mesh Point is licensed for
United States Public Safety operation.
C1' and C3, respectively, when the ES2440 Mesh Point is
equipped with 4.4 GHz band radios.