Advanced - Siemens SIMATIC NET SCALANCE W760 Series Configuration Manual

Configuring with Web Based Management
5.6 "Interfaces" menu
5.6.2.2

Advanced

Further possible settings
On this page, you can specify details of the transmission characteristics. You only need to
adapt the parameters on this page if the device cannot be used as it is intended with the
default settings.
Description
The table has the following columns:
● Radio
Shows the available WLAN interfaces in this column.
● Beacon Interval [ms] (Only in access point mode)
Specify the interval (40 - 1000 ms) at which the access point sends beacons. Beacons
are packets that are sent cyclically by an access point to inform clients of its existence.
● DTIM (Only in access point mode)
The DTIM interval (1-15) specifies the number of beacons to be sent before the access
point sends the collected packets (broadcast, unicast, multicast) to the client.
– If you enter a "1" in this box, the access point transmits broadcast, unicast and
– If you entered a "5" in this field, this would mean that the access point collects the
Increasing this value allows a longer sleep mode for the clients but means a greater delay
for packets.
● 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 specified packet size. You specify the packet size with
the "RTS/CTS Threshold" parameter.
● Fragmentation Length Threshold [Bytes]
Specify the maximum packet size transferred on the wireless link. Large packets are
divided up into small packets prior to transmission and then reassembled into the original
size after they have been received. This can be beneficial if the transmission quality is
poor because larger packets are more difficult to transmit. However fragmentation into
smaller packets means a poorer throughput.
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multicast packets directly after each beacon (recommended setting for normal network
environments).
packets and sends them after every fifth beacon.
SCALANCE W760/W720 to IEEE 802.11n Web Based Management
Configuration Manual, 11/2014, C79000-G8976-C350-03