This attribute indicates whether autobaud is active.
The modem is instructed at call setup time by the MSC on:
What is the initial modem data rate value and
Whether a modem is allowed to perform autobauding (on) or not
(off). With Autobauding on, the modem is allowed to connect using
a valid modem data rate less than or equal to the initial rate
specified to the modem by the MSC. If a modem can not perform
autobauding and the carrier can not be established at the initial data
rate, the modem is disabled.