Specifications

ISU AT Command Reference Phase I AT Commands
Iridium Proprietary Version 2.45
20 June 2011 32
+DR: V42B TD Data compression in use in transmit direction only.
Read Command: +DR?
Query the current reporting level setting. The response is in the form:
+DR: <mode>
Test Command: +DR=?
List the supported parameter settings. The response is in the form:
+DR: (supported <mode>s)
5.62 +IPR - Fixed DTE Rate (Initial implementation; revised in Phase VI)
Note: ISU models 9505 and 9522 will automatically adjust to changes in the DTE rate and override the
+IPR setting when dissimilar.
Set Command: +IPR=<rate>[,<autobaud>]
Set the data rate at which the ISU will accept commands. The change in data rate takes into effect after the
result code (e.g., OK) is received by the DTE.
<rate> takes the following values:
1 600 bps
2 1200 bps
3 2400 bps
4 4800 bps
5 9600 bps
6 19200 bps (default)
7 38400 bps
Note: The use of 38400 bps with ISU models “9505” or “9522” is not recommended because the ISU can
not handle this rate without losing some bits of data.
<autobaud> takes the following values:
0 disable autobaud
1 enable autobaud
Read Command: +IPR?
Query the current data rate. The response is in the form:
+IPR: <rate>
Test Command: +IPR=?
List the supported data rates. The response is in the form:
+IPR: (supported <rate>s)