Alvarion BreezeACCESS VL System Manual page 220

Chapter 4 - Operation and Administration
4.2.6.7.7 Promiscuous Authentication (AU only)
The Promiscuous Authentication mode enables new SUs to join an active cell
where Shared Key operation and/or Data Encryption are used, even if this SU
does not have the correct security parameters. In promiscuous mode, all
downlink transmissions (from AU to SUs) are not encrypted, allowing remote
configuration of security parameters, regardless of the current settings in the SUs
of the parameters related to data encryption. After a new SU joins the cell it
should be remotely configured with the proper parameters (or upgraded). When
the SU is configured properly, the Promiscuous Mode should be disabled.
The default is Disable.
NOTE
Do not leave the AU in the enabled Promiscuous Authentication mode for prolonged periods. Use it
only when absolutely necessary, perform the required actions as quickly as possible and disable it.
The unit will return automatically to Promiscuous Authentication disabled mode after reset.
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BreezeACCESS VL System Manual