Symbol WS5000 Series System Reference Manual page 719

The WS5000 switch allows the user to modify the DTIM interval. This value, also called as DTIM Period, is set
on a per AP Policy basis.
The choice of this DTIM period depends on what is more important–power consumption, or WLAN
performance.
• A longer DTIM interval results in reduced power consumption for devices in PSP mode.
• A shorter DTIM period would be desirable for voice traffic to improve voice quality.
This creates a conflict when the customer has both–WLAN phones and battery operated mobile devices that
transfer data on the same infrastructure. These two sets of devices may be on different WLANs but share
access ports. So the DTIM interval is forced to be the same for both. To solve this conflict, the user is now
enabled to set the DTIM on a per BSS basis.
Overview
The AP policy CLI context is enhanced to enable the user to set 4 DTIM interval values number 1-4. DTIM value
1 is used for BSS1, DTIM value 2 for BSS2, and so on. The first DTIM interval value is also the default, and is
DTIM Interval per BSS