Wireless configuration
Radio configuration
3-24
Manual channel selection
If setting the channel manually, for optimal performance when operating in 2.4 GHz modes,
select a channel that differs from other wireless APs operating in neighboring cells by at least
25 MHz. For example, if another AP is operating on channel 1, set the AP to channel 6 or
higher. See Wireless neighborhood on page 3-32 to view a list of APs currently operating in
your area. For detailed information on selecting channels when operating at 2.4 GHz, see
Selecting channels in the 2.4 GHz band on page 3-4.
When operating in 802.11a or 802.11n (5 GHz) modes, channels do not interfere with each
other, enabling APs to operate on two adjacent channels without interference.
HP APs support Dynamic Frequency Selection (802.11h) and Transmit Power Control
(802.11d) for 802.11a operation in European countries. These options are automatically
enabled as required. Channels used by dynamic frequency selection (DFS) for radar
avoidance, are identified with an asterisk “*”.
On the MSM410, MSM422 (radio 1), E-MSM430, E-MSM460, E-MSM466: When
Wireless mode is 802.11n (5 GHz) or 802.11n/a and Channel width is Auto 20/40
MHz, the channel numbers in the Channel list include either a “(1)” or “(-1)” to their
right. A “(1)” indicates that the 40 MHz channel is formed from the indicated channel plus
the next channel. A “-1” indicates that the 40 MHz channel is formed from the indicated
channel plus the previous channel.
With a 40 MHz Channel width in the 5 GHz band, channel selection and usage is as
follows for the first four channels:
Note The channel selected is the primary channel and the channel above or below it becomes
the secondary channel. The AP beacon is transmitted only on the primary channel and all
legacy client traffic is carried on the primary channel.
Channel selected Channels used
36(1) 36+40
40(-1) 40+36
44(1) 44+48
48(-1) 48+44
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