Iridium Communications, Inc. Information Contained in this Guide
Iridium 9523 Product Developers’ Guide is Subject to Change Without Notice
Revision 2.6
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5 One multiparty call active, plus waiting call
6 One single-party call held (dialing possible)
7 One multiparty call held (dialing possible)
8 Dual single-party call (one active, one held)
9 Dual call: single party call held, multiparty call active
10 Dual call: single party call active, multiparty call held
11 One single-party call held, plus waiting call
12 One multiparty call held, plus waiting call
13 Dual single-party call (one active, one held), plus waiting call
14 Dual call: single party call held, multiparty call active, plus waiting call
15 Dual call: single party call active, multiparty call held, plus waiting call
16 Busy, i.e. one or more calls are waiting for the network to process a change
<active call_state>, <held call state>:
0 Call is idle
1 MO establishment in progress
2 Waiting for user to answer MT call
3 User accepted MT call, completing establishment
4 Fully active
5 Call is part of fully active multiparty call
6 Call held
7 Call is part of held multiparty call
8 Multiparty (conference) build requested
9 Hold requested
10 Multiparty hold requested
11 Retrieve requested
12 Multiparty retrieve requested
13 Call is being removed (split) from multiparty call
14 Reestablishing
15 Releasing
<active index>,<held index>:
0..5 Index of call record
255 No call record
The +XCSI message extends the information available in the +DPLCI announcement. It will be sent
whenever there is a non-data call state change in the Iridium 9523’s internal Call Control (MMICC) state
machines, including during a voice call session (possibly with multiple concurrent calls) when any call
becomes held/active/waiting. There will be no +XCSI announcements during a data call, but there could
be one after the data call has finished, when the overall call state goes idle.
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