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Iridium Communications, Inc.
Iridium 9523 Product Developers' Guide
Revision 2.6
For example, the command string –MSVTS=1,[9,2],[5,3] will:
1. Generate DTMF 1 with a duration of 180 ms (default)
2. Generate DTMF 9 with a duration of 360 ms (2 * 180 ms)
3. Generate DTMF 5 with a duration of 540 ms (3 * 180 ms)
Test Command: –MSVTS=?
List the supported parameter settings. The response is in the form:
–MSVTS: (supported <tone>s),(supported <time>s)
Note: DTMF generated with the –MSVTS command is never played back locally as tones and is therefore
neither played nor muted under control of the –MSVLS command.
5.7.72 –MSVTR - DTMF Received in Voice Call
Set Command: –MSVTR=[<mode>]
Disable or enable the receiving of DTMF messages from the network.
<mode> takes one of the following values:
0
Receiving of DTMF disabled (default)
1
Receiving of DTMF enabled
If receiving DTMF is enabled, the Iridium 9523 sends the following unsolicited result code every time a
DTMF inband signaling data is received from the network while in a voice call:
–MSTRX: <tone>,<event>
where <tone> is the DTMF tone received ('0'-'9', '#', '*', 'A'-'D') and <event> can be one of the following:
0
tone stopped (i.e. key released)
1
tone started (i.e. key pressed)
Read Command: –MSVTR?
Query the current parameter settings. The response is in the form:
–MSVTR: <mode>
Test Command: –MSVTR=?
List the supported parameter settings. The response is in the form:
–MSVTR: (supported <mode>s)
5.7.73 –MSVLS - Local DTMF Feedback Selection
Set Command: –MSVLS=[<mode>]
Disable or enable playing of DTMF tones locally (i.e. feedback tones) while in a voice call.
<mode> takes one of the following values:
0
No mute. Play all DTMF tones (default) when pressed or received while in voice call.
1
Enable mute mode. Mute both pressed or received DTMF tones while in voice call.
Read Command: –MSVLS?
Query the current parameter settings. The response is in the form:
Iridium Communications, Inc.
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