Symbol Technologies WS 2000 manual Beacon Interval, Dtim Period

WLAN—Setting Default Access Port Settings

8. Set the beacon values as indicated in the table below.

Beacon Interval	A beacon is a packet broadcast by the adopted access ports
	to keep the network synchronized. Included in a beacon is
	information such as the WLAN service area, the access-port
	address, the broadcast destination addresses, a time stamp,
	and indicators about traffic and delivery such as a DTIM.
	Specify a beacon interval in units of 1,000 microseconds
	(K-us). This is a multiple of the DTIM value, for example,
	100 : 10. Increase the DTIM/beacon settings, lengthening
	the time, to let nodes sleep longer and preserve their battery
	life. Decreasing this value (shorten the time) to support
	streaming-multicast audio and video applications that are
	jitter-sensitive.
DTIM Period	A DTIM is periodically included in the beacon frame that is
	transmitted from adopted access ports. The DTIM period
	determines how often the beacon contains a DTIM, for
	example, 1 DTIM for every 10 beacons. The DTIM indicates
	that broadcast and multicast frames, buffered at the access
	port, are soon to arrive. These are simple data frames that
	require no acknowledgment, so nodes sometimes miss
	them.
	In this field, the administrator can specify a period for the
	Delivery Traffic Indication Message (DTIM). This is a divisor
	of the beacon interval (in milliseconds); for example, 10 :
	100. Increase the DTIM/beacon settings, lengthening the
	time, to let nodes sleep longer and preserve their battery life.
	Decrease this settings (shortening the time) to support
	streaming-multicast audio and video applications that are
	jitter-sensitive.

Copyright © 2004 Symbol Technologies, Inc. All Rights Reserved	46
WS 2000 Wireless Switch: 1.0 Date of last Revision: March 2004