User Manual

Iridium Communications, Inc. Information Contained in this Guide
Iridium 9523 Product Developers’ Guide is Subject to Change Without Notice
Revision 2.6
Iridium Communications, Inc. Distribution of Guide Restricted
Proprietary & Confidential Information Page 97 of 115 to Product Developers
Only
6 S-Register Definitions
S-registers allow control over specific Iridium 9523 operations. Some S-registers contain a single
numeric value. Other S-registers are bit mapped where individual bits, or sets of bits, control specific
functions.
6.1 S-Register Commands
Commands allow S-registers to be read, written, or simply referenced (i.e. set a pointer to designate the
current, referenced S-register). S-register commands are described in the following subsections.
6.1.1 Sr - Direct S-Register Reference
Set a pointer to reference S-register r.
6.1.2 Sr? - Direct S-Register Read
Read the value of S-register r.
6.1.3 Sr=n - Direct S-Register Write
Set the value of S-register r to n, where n is a decimal value in the range 0 to 255.
6.1.4 ? - Referenced S-Register Read
Read the value of the current referenced S-register. The current referenced S-register is that which was
last acted upon by a direct reference (ATSr), read (ATSr?), or write (ATSr=n) command.
6.1.5 =n - Referenced S-Register Write
Set the value of the current referenced S-register to n. The current referenced S-register is that which
was last acted upon by a direct reference (ATSr), read (ATSr?), or write (ATSr=n) command.
6.2 Standard S-Registers
Table 16: Standard S-Registers
Register
Number
Range Default Description
Sr=n Command
Write Protected
in SAC0201
S0 0-255 0 Autoanswer. Assigning a value from 1 to 255 in
register S0 tells the Iridium 9523 to automatically
answer incoming calls. The factory setting of 0 turns off
the automatic answer feature.
Register S15 controls the type of call to be
automatically answered.
S1 0-255 0 Ring count Yes
S2 0-255 43 Escape code character