Symbol Technologies WS 2000 - Manual (Page 46)

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