Siemens SCALANCE W1780 Configuration Manual page 229

● RTS/CTS Threshold [Bytes]
RTS/CTS (Request To Send/Clear To Send) is a method for avoiding collisions. The
method is based on the exchange of status information prior to sending the actual data
(hidden node problem). To minimize the network load due to additional protocol traffic, this
method is used only as of a certain packet size. You specify the packet size with the "RTS/
CTS Threshold" parameter.
● HW Retries (only in access point mode)
Specify the number of hardware retries. The hardware repetition is performed by the WLAN
chip itself when it tries to repeat an unacknowledged packet immediately.
If all hardware repetitions were unsuccessful, the packet is deleted and the WLAN client is
removed from the list.
● Prefer Configured DFS Channel (only in access point mode)
– Enabled
– Disabled
Procedure
1. Enter the values to be set in the input boxes as follows.
2. Select the option checkmark of the required functions.
3. Click the "Set Values" button.
SCALANCE W1780/W1740 according to IEEE 802.11ac Web Based Management
Configuration Manual, 11/2019, C79000-G8976-C485-03
This function is only available if you have enabled the "DFS" function on the "Basic" page.
If the configured channel of a WLAN interface was blocked due to radar detection and is
released again after 30 minutes the access point changes automatically to the
configured channel.
Before the access point starts the communication on the configured channel it searches
60 seconds for primary users on the channel. During this time the access point does not
send beacons. If signals are found on the channel, the access point changes channel
and repeats the check. Only when no signals from primary users are detected after 60
seconds does the access point send on the channel.
If you have configured "Auto" for the channel on the "Interfaces > WLAN > AP" page, the
device does not have a configured channel to which it can return.
The function is not used.
Configuring with Web Based Management
6.6 "Interfaces" menu
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