Specifications
ISU AT Command Reference  Phase VI AT Commands 
Iridium Proprietary Version 2.45 
20 June 2011     86 
SBDRING when an SBD ring alert is received. 
Read Command: +SBDMTA? 
Query the current ring indication mode. The response is of the form: 
  +SBDMTA:<mode> 
Test Command: +SBDMTA=? 
List the supported mode settings. The response is of the form: 
  +SBDMTA:(supported <mode> settings) 
10.17  +SBDREG - Short Burst Data: Network Registration 
Exec Command: +SBDREG[=<location>] 
Triggers an SBD session to perform a manual SBD registration. 
This command initiates an SBD session to perform a manual SBD registration, consisting of an attach and 
location update. This session does not transfer any MO or MT messages. 
Note: The ISU restricts the number of manual and automatic registrations to one every 3 minutes.  
Successive attempts within 3 minutes will return an error code indicating that the FA should try later (see 
error 36 below). 
Note: A user can send an MO SBD message and register at the same time by using the +SBDIX command. 
The  +SBDIX command always performs a registration attempt and should be used for an application 
requiring SBD Ring Alert. The +SBDI command never includes an SBD registration and should be used 
for an application that does not require SBD Ring Alert. 
<location> has format: 
  [+|-]DDMM.MMM,[+|-]dddmm.mmm 
where: 
  DD  Degrees latitude (00-89) 
  MM  Minutes latitude (00-59) 
  MMM  Thousandths of minutes latitude (000-999) 
  ddd  Degrees longitude (000-179) 
  mm  Minutes longitude (00-59) 
  mmm  Thousandths of minutes longitude (000-999) 
  This command initiates an SBD session between the ISU and the GSS, setting the SBD Session 
The optional sign indicators specify latitude North (+) or South (-), and longitude East (+) or West (-). If 
omitted, the default is +. 
For example, 
  AT+SBDIX=5212.483,-00007.350 
corresponds to 52 degrees 12.483 minutes North, 0 degrees 7.35 minutes West. 
Command Response: 
+SBDREG:<status>,<reg err> 
where: 
<status> indicates the resulting registration status of the ISU: 
  0  Detached – ISU is detached as a result of a successful +SBDDET or +SBDI command. 
  1  Not registered – ISU is attached but has not provided a good location since it was last 










