Intermec MobileLAN 21 Series, Системное руководство, Страница: 136 / 275

MobileLAN access 21XX System Manual
5-14
Use the following table to configure advanced parameters.
Parameter Description
Data Rate Choose the rate at which the access point transmits data. In general,
higher speeds mean shorter range and lower speeds mean longer range.
If you choose the Speed Mode to be 802.11 compliant, you can set this
rate to 54, 48, 36, 24, 12, or 6 Mbps. If you choose the Speed Mode to
be Turbo, you can set this rate to 72, 48, 36, 24, or 12 Mbps.
Data Rate Fallback Determines if you want the radio to drop to a slower data rate when it
has trouble communicating with another radio. This parameter also
limits your range to the Data Rate selected above.
Basic Rate Choose the rate at which the access point transmits multicast frames. In
general, higher speeds mean shorter range and lower speeds mean
longer range. Do not set this rate higher than the maximum rate at
which your end devices can receive multicast frames. You can set this
rate to 24, 12, or 6 Mbps. This parameter should usually be left at the
default of 12 Mbps.
Medium
Reservation Determines if you want to specify a reservation threshold. Choose
Enabled to set a threshold value. If you choose Disabled, you may
improve network response time in installations that primarily send very
small frames or that have no hidden stations.
Reservation
Threshold If you enable medium reservation, you need to set a threshold value,
which is the largest data packet that can be transmitted without
reserving air time. Air time is normally reserved to help prevent
collisions with other transmitters.
DTIM Period Specifies the number of beacon frames to skip before including a
DTIM (delivery traffic indication message) in a beacon frame. Setting a
higher DTIM period may conserve battery life in a wireless end device,
but it may increase response time. You can set the DTIM period to a
value from 1 to 65535.