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Iridium Communications, Inc.
Iridium 9523 Product Developers' Guide
Revision 2.6
1
Upon connection, the Iridium 9523 reports the line speed, the error correction protocol
and the FA speed in that order
2
Upon connection, the Iridium 9523 reports the DCE speed
5.7.9
Zn - Soft Reset
Reset the Iridium 9523 to a user-stored configuration.
0
Restores user configuration 0
1
Restores user configuration 1
5.7.10 &Cn - DCD Option
Select how the Iridium 9523 controls the DCD behavior.
0
DCD is forced on at all times
1
DCD indicates the connection status (default)
5.7.11 &Dn - DTR Option
Set the Iridium 9523 reaction to DTR signal.
0
DTR is ignored in all modes. A DTR signal input is not needed when set to &D0.
For all other &Dn settings, the following applies.
DTR must be ON during on-hook command mode. If DTR transitions from ON to OFF during on-hook
command mode, operation will be locked after approximately 10 seconds. On-hook command mode
operation will resume when DTR is restored ON.
DTR must be ON at call connection
DTR must be ON during both in-call command mode and in-call data mode. Reaction to DTR ON to OFF
transitions during in-call command mode and in-call data mode is determined by the &Dn setting as
shown below. Note that the +CVHU command can be set to override these specified reactions.
1
If DTR transitions from ON to OFF during in-call command mode, and DTR is restored
ON within approximately 10 seconds, the call will remain up. If DTR is not restored ON
within approximately 10 seconds, the call will drop to on-hook command mode.
If DTR transitions from ON to OFF during in-call data mode, the mode will change to in-
call command mode. If DTR is restored ON within approximately 10 seconds, the call will
remain up. If DTR is not restored ON within approximately 10 seconds, the call will drop
to on-hook command mode.
2
If DTR transitions from ON to OFF during either in-call command mode or in-call data
mode, the call will drop to on-hook command mode (default).
3
If DTR transitions from ON to OFF during either in-call command mode or in-call data
mode, the call will drop to on-hook command mode and the Iridium 9523 will reset to AT
command profile 0.
5.7.12 &Fn - Restore Factory Settings
Recall factory defaults.
0
Recall factory default 0
Iridium Communications, Inc.
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