AC75 AT Command Set
4.9 AT+IPR s
AC75_ATC_V01.002 Page 118 of 569 10/30/06
Confidential / Released
- The TA cannot distinguish between 1 and 2 stop bits. Therefore, 1 stop bit will be used by the TA.
- The command A/ cannot be used.
- Only the first "AT" or " at" after restart of the module can be detected (neither "At" nor "aT"). This means
that all the AT commands have to use the same bit rate and frame type.
- The second serial interface ASC1 does not support autobauding.
- Autobauding cannot be used if the ME operates with Java.
- URCs that may be issued befor e the ME detects a new bit rate (by receiving the first AT character) will be
sent at the previously detected bit rate or, after ME restart, at 115200 bps.
• Autobauding and bit rate after restart:
Unless the bit rate is determined, the following constraints apply:
- An incoming CSD call or a network initiated GPRS request cannot be accepted. This must be taken into
account when autobauding and autoanswer mode (ATS0 ≠ 0) are enabled at the same time, escpecially
if SIM PIN 1 authentication is done automatically and the setting ATS0 ≠ 0 is stored to the user profile with
AT&W.
- Until the bit rate is found, URCs generated after restart will be output at 115200 bps. This applies only to
user defined URCs, such as "+CREG", "CCWA", "^SCKS" etc. The URCs "^SYSSTART", "^SYSSTART
CHARGE-ONLY MODE" and "^SYSSTART AIRPLANE MODE" will not be indicated when autobauding is
enabled.
Note: To avoid any problems caused by undetermined bit rates in the direction from TA to TE we strongly
recommend to configure a fixed bit rate rather than autobauding.
• Autobauding and multiplex mode:
If autobauding is active you cannot switch to multiplex mode (see AT+CMUX).