Motorola WiNG 4.4, Reference Manual

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Network Setup 4 - 99
19.When the Voice Call Admission Control is enabled in the Global Settings , the Admission Control Settings
section allows you to modify the following properties.
Beacon Interval Specify a beacon interval in units of 1,024 microseconds (K-us). This is a multiple of the DTIM
value, for example, 100: 10. (See "DTIM Period" below). 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 radio-port address, the broadcast destination
addresses, a time stamp, and indicators about traffic and delivery such as a DTIM. Increase
the DTIM/beacon settings (lengthening the time) to let nodes sleep longer and preserve
battery life. Decrease these settings (shortening the time) to support streaming-multicast
audio and video applications that are jitter-sensitive. The default is
100 K-us.
Self Healing Offset When an Access Port increases its power to compensate for a failure, power is increased to
the country's regulatory maximum. Set the Self Healing Offset to reduce the country's
regulatory maximum power if Access Ports are situated close to each other or if an Access
Port uses an external antenna.
DTIM Periods Select the DTIM periods button to specify a period for Delivery Traffic Indication Messages
(DTIM) for BSS IDs 1-4. This is a divisor of the beacon interval (in milliseconds), for example,
10:100. (See "Beacon Interval“above). A DTIM is periodically included in the beacon frame
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 broadcast
and multicast frames (buffered at the Access Port) are soon to arrive. These are simple data
frames that require no acknowledgement, so nodes sometimes miss them. Increase the
DTIM/beacon settings (lengthening the time) to let nodes sleep longer and preserve their
battery life. Decrease these settings (shortening the time) to support streaming-multicast
audio and video applications that are jitter-sensitive. The default DTIM period is 10 beacons
for BSS 1-4.
Aggregation This allows the type ‘n’ packets to be aggregated before transmission. This feature is
available only for type ‘n’ radios.
Max Admitted
MUs for Voice
Traffic Specify the maximum number of MUs allowed to connect to the specified radio for voice
traffic. Limiting the number of MUs can ensure that all voice MUs receive enough bandwidth
to ensure voice quality.
Max Roamed MUs
for Voice Traffic Specify the maximum number of voice MUs that are allowed to roam to this radio. Limiting
the number of MUs can ensure that all voice MUs receive enough bandwidth to ensure voice
quality.
Max Airtime for
Voice Specify a maximum percentage out of the radio's total airtime that may be used for voice.
Max Airtime for
Reserved Roaming Specify a maximum percentage out of the radio's total airtime that may be used for voice MUs
which roam from other APs.