AT Command Set
MC35_ATC_01_V05.00 Page 47 of 256 15.07.2002
Test command
AT+IPR=?
Response
+IPR: (list of supported auto-detectable <rate>s), (list of supported fixed-only
<rate>s) OK
Parameter
See write command
Read command
AT+IPR?
Response
+IPR: <rate> OK
Parameter
See write command
Write command
AT+IPR=<rate>
This command specifies the DTE-DCE bitrate. When you set a fix rate, m ake sure
that both DTE (TE) and DCE (= TA) are configured to the same ra te. When you
select autobauding the DCE will automatically recognize the bitr ate currently used
by the DTE.
A selected bitrate takes effect following the issue of any result code ass ociated
with this command (e.g. OK).
The setting is stored in the non-volatile memory and will be used whenever the
engine is powered up again. However, in case of autobaud mode (+IPR=0) the
detected DCE bitrate will not be saved and, therefore, needs to be be r e-
synchronized after restarting the GSM engine (see Chapter 2.45.1).
Response
OK or if error is related to ME functionality: ERROR / +CME ERROR: <err>
Parameter
<rate> bit rat e per second
0 (Autobauding, see Chapter 2.45.1)
300
600
1200
2400
4800
9600
14400
19200
28800
38400
57600
115200
In order to account for greater amounts of data it is recommended to choose a
minimum bit rate of 2400 bps. If the ME is operated in Multiplex mode we suggest
a minimum bit rate of 4800 bps.
Reference
V.25ter
Note
Factory setting is <rate>=0. It cannot be restored with AT&F. The current s etting
will be preserved when you download new firmware or when the ME is powered
down.