B&B Electronics WLNN-AN(ER,SE,SP.EK)-DP551 - Manual - Manual (Page 87)

Airborne Enterprise CLI Reference Manual 87
will enter sleep mode. When in sleep mode the device server is not accessible
from the network interface and will not respond to any network initiated
communications. When UART traffic is detected the radio will wake from sleep
and re-establish the data tunnel, if no traffic is received or sent before the wl-
sleep-timer expires, the radio will return to sleep mode. Any serial transmitted
data sent before the data tunnel has been re-established will be buffered and
transmitted when the connection is available. In this use of the sleep mode, the
host is relieved of any power management monitoring or control of the device
server, while optimizing power usage.
When the UART pass mode is used with power save it is important to note that
the TCP/IP timeout is still running and will close the TCP/IP connection if it
expires before the device server re-establishes the TCP/IP connection from sleep
mode.
If the wl-sleep-timer is being used to manage the power state of the radio,
consideration must be made for the finite time the radio takes to re-establish its
connection with the network. This is true for both listen and pass mode operation.
If the wl-sleep-timer is set to a value that is less than the time it takes for the
radio to re-establish the connection it will place the radio back into sleep mode.
When in listen mode the time to be considered is the time it takes the radio to
associate to the target network (this must include any authentication delays that
may be introduced for the Enterprise authentication processes). When in pass
mode you must account for the additional network set-up time and packet
delivery. We do not recommend setting wl-sleep-timer to a value less than 6
seconds.