Specifications

Chapter 17 – Audio Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 224
17.19 AT^SRTC Ring Tone Configuration
Description: The AT^SRTC read command returns the current <type> and current <volume>. It can be used
while test playback is off or on. In the latter case, see execute command for details.
The AT^SRTC execute command is intended for testing. It starts to play a melody from the
audio output currently selected with AT^SNFS. To deactivate test playback use AT^SRTC again.
During test playback, you can enter the write command to select another melody and adjust the
volume. Also, you can enter the read command to check the type and volume of the current ring
tone and to view the status of playback (on / off). The test ringing signal cannot be activated
when an MTC is ringing (ERROR).
Selecting <volume>=0 during the test, immediately stops playback. After this, ring tones will be
muted until you change <volume> using the write command.
The AT^SRTC write command chooses the type and volume of ring tones. The settings can be
changed no matter whether or not the ME is ringing. The selected type and volume are saved in
the non-volatile Flash memory and, thus, are retained after Power Down. An exception is
<type>=0, that can be entered to quickly mute the tone or melody currently played to indicate an
event. <type>=0 only stops immediately the audible ring tone, but does not terminate the URC
that indicates the event (for example RING). No permanent settings are changed or saved.
Test Command: AT^SRTC=?
Response: ^SRTC:(list of supported) <type>s, (list of supported) <volume>s
OK
Read Command: AT^SRTC?
Response: ^SRTC: <type>, <volume>, <status>
OK
Exec Command: AT^SRTC
Response: OK
Write Command: AT^SRTC=[<type>][, <volume>]
Response: ^SRTC: <type>, <volume>
OK
ERROR
Parameter Description:
<type>
Type of ring tone. You have a choice of 7 different ring tones and melodies. All will be played from the audio
output selected with the AT^SNFS command. <type>=0 is only intended for muting.
0 Mutes the currently played tone immediately.
1 Sequence 1
2 Sequence 2
3 Sequence 3
4 Sequence 4
5 Sequence 5
6 Sequence 6
7 Sequence 7
<volume>
Volume of ring tone, varies from low to high
0 Mute
1 Very low
2 Identical with 1
3 Low
4 Identical with 3
5 Middle
6 Identical with 5
7 High
<status>
Status of test ringing. Indicates whether or not a melody is currently being played back for testing
0 Switched off
1 Switched on
Notes:
• Before first using ring tones note that the following settings apply:
We have chosen to let you decide your own preferences when you start using ring tones. Therefore, factory
setting is AT^SRTC=3,0,0 (ring tones are muted). To activate ring tones for the very first time, first enter the
write command and simply change the volume. After applying a firmware update the volume and type selected
before the firmware update will be preserved.
• The test ringing signal cannot be activated while an MTC is ringing (ERROR).
• If an MTC arrives during test playback, test ringing will be deactivated and “normal” ringing reactivated (RING).
Likewise, an MOC will also stop test ringing.
• If no optional parameter is entered, the old value will be kept.