Symbol Technologies WS 2000 - Manual (Page 49)

WLAN—Advanced Access Port Settings
8. Set the Access Port beacon settings by clicking on the Beacon Settings button. The
following window appears.
9. 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 49
WS 2000 Wireless Switch: 1.0 Date of last Revision: March 2004