Cisco Small Business AP541N Administration Manual page 84

Wireless
Modifying Advanced Settings
Cisco AP541N Dual-band Single-radio Access Point Quick Start Guide
Table 19 Advanced Settings Field Descriptions
Field Description
This field is available only if the radio mode includes 802. 1 1n.
STBC Mode
Space Time Block Coding (STBC) is an 802. 1 1n technique
intended to improve the reliability of data transmissions. The
data stream is transmitted on multiple antennas so the
receiving system has a better chance of detecting at least
one of the data streams.
Select one of the following options:
The protection feature contains rules to guarantee that
Protection
802. 1 1 transmissions do not cause interference with legacy
stations or applications. By default, these protection
mechanisms are enabled (Auto). With protection enabled,
protection mechanisms will be invoked if legacy devices are
within range of the access point.
You can disable (Off) these protection mechanisms; however,
when protection is off, legacy clients or access points within
range can be affected by 802. 1 1n transmissions. Protection is
also available when the mode is 802. 1 1b/g. When protection
is enabled in this mode, it protects 802. 1 1b clients and
access points from 802. 1 1g transmissions.
Note: This setting does not affect the ability of the client to
associate with the access point.
Beacon frames are transmitted by an access point at regular
Beacon
Interval intervals to announce the existence of the wireless network.
The default behavior is to send a beacon frame once every
100 milliseconds (or 10 per second).
Enter a value from 20 to 2000 milliseconds.
• On. The access point transmits the same data stream
on multiple antennas at the same time.
• Off. The access point does not transmit the same data
on multiple antennas.
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