User Manual

Iridium Communications, Inc. Information Contained in this Guide
Iridium 9523 Product Developers’ Guide is Subject to Change Without Notice
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<MO status>:
MO session status provides an indication of the disposition of the mobile originated transaction. The field
can take on the following values:
0 No SBD message to send from the Iridium 9523
1 SBD message successfully sent from the Iridium 9523 to the GSS
2 An error occurred while attempting to send SBD message from Modem to GSS
<MOMSN>:
The Mobile Originated Message Sequence Number (MOMSN) is a value assigned by the Iridium 9523
when sending a mobile-originated message to the GSS. This value is incremented each time an SBD
session is successfully completed between the Iridium 9523 to the GSS. This wraparound counter can
range from 0 to 65535.
<MT status>:
The MT status provides an indication of the disposition of the mobile terminated transaction. The field
can take on the following values:
0 No SBD message to receive from the GSS
1 SBD message successfully received from the GSS
2 An error occurred while attempting to perform a mailbox check or receive a message
from the GSS
<MTMSN>:
The Mobile Terminated Message Sequence Number (MTMSN) is assigned by the GSS when forwarding
a message to the Iridium 9523. This value is indeterminate if the field <MT status> is zero. This
wraparound counter can range from 0 to 65535.
<MT length>:
The MT length is the length in bytes of the mobile terminated SBD message received from the GSS. If no
message was received, this field will be zero.
<MT queued>:
MT queued is a count of mobile terminated SBD messages waiting at the GSS to be transferred to the
Iridium 9523.
5.7.106 +SBDIX[A] - Short Burst Data: Initiate an SBD Session Extended
Note: The +SBDIX command must be used in place of the +SBDI command for FAs wishing to make use
of SBD Ring Alert functionality.
Exec Command: +SBDIX[A][=<location>]
This command initiates an SBD session between the Iridium 9523 and the GSS, setting the SBD Session
Type according to the type of command +SBDIX or +SBDIXA, Delivery Short Code according to the value
specified by the +SBDDSC command, and the type of location according to whether the optional location
value is provided. If there is a message in the mobile originated buffer it will be transferred to the GSS.
Similarly if there are one or more messages queued at the GSS the oldest will be transferred to the
Iridium 9523 and placed into the mobile terminated buffer.
 The message, if any, in the mobile originated buffer will be sent from the Iridium 9523 to the GSS
 If there is a message queued at the GSS it will be transferred to the Iridium 9523 and placed into
the mobile terminated buffer