0049-1800-xxx 326X V.34, V.34-SDC and V.32bis Series Modem – USER’S GUIDE 02/23/2010
Rev. A
Page 73
of
205
For Further Details on AT Commands
For a description of AT commands, and dial modifiers, refer to Appendix A.
Autobaud Feature
The modem automatically detects the speed and character format of the following AT commands issed
from your DTE:
•
AT
•
at
•
A/
•
a/
This means that any AT command you issue to the modem will cause the modem to “Autobaud.” The
exception is the lower-case “a/” and upper-case “A/”, from which only speed can be detected. When
the a/ or A/ commands are issued, the modem assumes parity to be the same as that of the previous
command.
NOTE:
Autobaud does not operate when the modem is online in escape mode.
Autobauding works at the following DTE rates (bps):
Table 5-2 summarizes the 10-bit-total character formats for autobauding. (Autobauding is valid only
with 10-bit character formats.)
Result codes, such as RING, are sent at the last autobauded DTE speed and parity. CONNECT result
codes are also sent at the last autobauded DTE speed, even if the call is established at a different speed.
When the modem is turned on, the last autobauded speed is saved. Because parity is saved within
option sets, the parity value that is saved in the power-up option set is the one that is active.
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