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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List the supported result code settings. The response is in the form:
+CR: (supported <mode>s)
5.7.69 +CVHU - Voice Hangup Control
Set Command: +CVHU=[<mode>]
Selects whether the Hn (hangup) or &Dn command shall cause a voice call connection to be
disconnected or not. <mode> can take one of the following values:
0 Ignore &Dn command specified reaction to DTR ON to OFF transitions. Disconnect as
reaction to Hn command. OK response given.
1 Ignore &Dn command specified reaction to DTR ON to OFF transitions. Ignore Hn
command. OK response given.
2 Comply with &Dn command specified reaction to DTR ON to OFF transitions.
Disconnect as reaction to Hn command (default).
Read Command: +CVHU?
Query the current voice control hangup settings. The response is in the form:
+CVHU: <mode>
Test Command: +CVHU=?
List the supported voice control hangup settings. The response is in the form:
+CVHU: (supported <mode>s)
5.7.70 +CCLK - Real-Time Clock
Set Command: +CCLK=[<time>]
Sets the real-time clock of the Iridium 9523. If setting fails, ERROR is returned.
<time>: string type value; format is “yy/MM/dd,hh:mm:sszz”, where characters indicate year (two last
digits), month, day, hour, minutes, seconds and time zone. There is no blank space between the
two double quotes. Since time zone feature is not supported in Iridium, this particular field (zz) is
ignored if it is entered. The range of valid years is between 1970 and 2058.
For example, May 15, 2011, 22:10:00 hours can be set using +CCLK= “11/05/15,22:10:00”.
Read Command: +CCLK?
Read command returns the current setting of the clock.
+CCLK: <time>
5.7.71 –MSVTS - DTMF Generation in Voice Call
Set Command: –MSVTS=<string>
Generate the specified DTMF tone (i.e., send tone DTMF message to network). The parameter <string>
shall consist of elements in a list where each element is separated by a comma. Each element should
either be (1) a single ASCII character; or (2) string that follows the format: <tone>[,<time>] with each
string enclosed in square brackets “[]”. The string parameter values are defined as follows:
<tone> specifies the string of tones to be played or generated. The valid values are (in ASCII):
‘0’-’9’, ‘#’, ‘*’
<time> specifies the duration of each tone in 180-millisecond unit. Default value is 1 for 180 ms.
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