Alvarion BreezeACCESS VL System Manual page 167

4.2.6.2.12 Maximum Number of Associations (AU only)
The Maximum Number of Associations parameter defines the maximum number
of Subscriber Units that can be associated with the selected AU, while still
guaranteeing the required quality of service to customers.
Available values for AU-BS and AU-SA range from 0 to 512. For AUS-BS and
AUS-SA the range is from 0 to 8.
Default value for AU-BS and AU-SA is 512. For AUS-BS and AUS-SA the default
is 8.
NOTE
When the Data Encryption Option is enabled, the actual maximum number of SUs that can
associate with the AU-BS or AU-SA is limited to 124. The number displayed for the Maximum
Number of Associations is the value configured for this parameter, which might be higher than the
actual limit. The Maximum Number of Associations Limit (512 when Data Encryption is disabled,
124 when Data Encryption is enabled) is indicated in the Show Air Interface Parameters display.
NOTE
There is no aging time for SUs. An SU is only removed from the list of associated SUs under the
following conditions:
A SNAP frame is received from another AU indicating that the SU is now associated with the
other AU.
The SU failed to respond to a certain number of consecutive frames transmitted by the AU and
is considered to have "aged out".
Therefore, the database of associated SUs may include units no longer associated with the AU. If
the number of associated SUs has reached the value of the Maximum Number of Associations
parameter, the selected AU cannot serve additional SUs. To view the current number of associated
SUs, use the Display Association Info option in the MAC Address Database menu. To delete
inactive SUs from the database you must reset the AU.
4.2.6.2.13 Wireless Link Trap Threshold (AU only)
The Wireless Link Trap Threshold parameter defines the threshold for the
wireless quality trap, indicating that the quality of the wireless link has dropped
below (on trap) or has increased above (off trap) the specified threshold.
The Wireless Link Trap Threshold is in percentage of retransmissions, and the
allowed range is from 1 to 100 (%).
The default is 30 (%).
4.2.6.2.14 Country Code Learning by SU (AU only)
This feature supports simplified installation and updates processes by enabling
the SU to adapt the Country Code used by the AU.
The AU advertises its country code in every beacon and association response
message. Upon synchronization the SU shall check if its country code and the
country code received from the AU are the same. If they are not the same and the
Operation and Administration
Menus and Parameters
141