Specifications
ISU AT Command Reference Phase VI AT Commands
Iridium Proprietary Version 2.45
20 June 2011 84
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:
+SBDIX:<MO status>,<MOMSN>,<MT status>,<MTMSN>,<MT length>,<MT
queued>
where:
<MO status>:
MO session status provides an indication of the disposition of the mobile originated transaction. The field
can take on the following values:
Gateway-reported values:
0 MO message, if any, transferred successfully.
1 MO message, if any, transferred successfully, but the MT message in the queue was too
big to be transferred.
2 MO message, if any, transferred successfully, but the requested Location Update was
not accepted.
3..4 Reserved, but indicate MO session success if used.
5..8 Reserved, but indicate MO session failure if used.
10 GSS reported that the call did not complete in the allowed time.
11 MO message queue at the GSS is full.
12 MO message has too many segments.
13 GSS reported that the session did not complete.
14 Invalid segment size.
15 Access is denied.
ISU-reported values:
16 ISU has been locked and may not make SBD calls (see +CULK command).
17 Gateway not responding (local session timeout).
18 Connection lost (RF drop).
19 Link failure (A protocol error caused termination of the call).
20..31 Reserved, but indicate failure if used.
32 No network service, unable to initiate call.
33..34 Reserved, but indicate failure if used.
35 ISU is busy, unable to initiate call.
36.. Reserved, but indicate failure if used.
<MOMSN>:
The Mobile Originated Message Sequence Number (MOMSN) is a value assigned by the ISU when
sending a mobile-originated message to the GSS. This value is incremented each time an SBD session is
successfully completed between the ISU to the GSS. This wrap around counter can range from 0 to 65535.