Intermec MobileLAN 21 Series System Manual page 145

S-UHF Parameters Table (continued)
Parameter
Master Mode
Attach Priority
Multicast Filter
File Name
Hello Period
Explanation
Determines how channel access is controlled.
Enabled Sets the access point to control channel access for end
devices in its coverage area, and end devices automatically operate as
slaves. Enabling may improve performance in some environments, but
you should only enable Master Mode if the access point radio coverage
area does not overlap other access points operating in the same area.
Disabled Causes all radios in the network to cooperate as peers, and
access point and end devices coordinate channel access as each radio
bids for time. Disabling Master Mode often provides quicker access
times on lightly- to moderately-loaded systems. Disabling overlaps
coverage areas with access points on the same or different frequencies.
Determines the likelihood that the access point will obtain media
access. This parameter only appears when Master Mode is Disabled.
High Causes the radio to be more likely than an end device to obtain
transmit time.
Medium Causes the radio to be equally likely as an end device to
obtain transmit time.
Low Causes the radio to be less likely than an end device to obtain
transmit time.
Set Attach Priority when you need a redundant network with some
access points serving as standby units. If a higher priority access point
fails, end devices fall back to a lower priority access points in the same
coverage area.
You should position the antenna at least 3 m (10 ft) away from the
access point to achieve the specified performance for the S-UHF radio.
Determines if this radio can receive and send multicast packets.
Specifies the name of the radio's driver software. Change this name
only when directed to do so by Intermec Technical Support.
Controls how frequently the access point broadcasts hello packets on
the S-UHF port. Hello packets help maintain the spanning tree and
serve as beacon messages to synchronize communications with power-
managed end devices.
Configuring the Radios
5
5-23