Configuration / project engineering
5.6 Configuration with Web Based Management
SCALANCE W786-xPRO
152
Operating Instructions, Release 08/2007, C79000-G8976-C221-02
5.6.8
The I-Features menu
5.6.8.1
I-Features menu command
Note
The "I-Features" menu and the corresponding menu commands are available only when you
operate the SCALANCE W78x in the access point mode. You can specify the mode in the
"System" menu.
The iPCF menu command is available only for a SCALANCE W747-1RR, SCALANCE
W747-1 and an IWLAN/PB LINK.
5.6.8.2
iQoS menu command (in access point mode only)
Note
This function is not available in iPCF mode.
Client-specific bandwidth reservation
iQoS (Quality of Service) is technique with which clients are assigned a certain bandwidth.
Due to this assignment, there is a high probability that data transmission to these clients will
be within a defined period. This technique can be useful when response times must be
guaranteed. If non-iQoS-clients put too much load on the network, they can be logged off
from the AP to guarantee data traffic for iQoS clients.
Note
To ensure problem-free functioning of the iQoS mode, the number of clients with bandwidth
reservation is restricted to four.
Note
If the user reserves data for critical clients, this data rate also includes the frame header (in
other words, 802.11, MAC, IP, TCP, and S7 header). A SIMATIC user must therefore take
into account not only the net data during configuration but also the headers.