Control calls
There are some special IDs and callsigns which trigger built-in services and actions when a call is received to them from your radio.
Local echo service
If the local echo service's ID or callsign is called, the openSPOT4 records the voice transmission and plays it back after the call from the radio is finished. This is useful for hearing your own voice back to test the connection between your radio and the openSPOT4. If you have local echo voice quality issues, see the AutoCal special connector.
The local echo service can be triggered if the call is sent to the following IDs/callsigns:
- DMR, NXDN® and P25:** ID 9999. Both private and group calls to this ID are answered with a private call.
- D-STAR®: call is sent to
.......E
(7 spaces and an E, replace dots with spaces). - C4FM: call DGID is set to 99.
Note that only about 5-10 seconds can be recorded and played back by the local echo service (supported echo duration depends on the used modem mode).
Current configuration profile query
The current configuration profile's number can be queried by calling the following IDs/callsigns:
- DMR, NXDN® and P25: ID 9000. Both private and group calls are interpreted.
- D-STAR®: call is sent to
.......P
(7 spaces and an P, replace dots with spaces), or DTMF code A is entered. - C4FM: Special command/cross mode private call DTMF code (by default it's *) is entered followed by DTMF code A.
The current configuration profile number will be announced by the voice. The DMR/NXDN®/P25 profile query ID can be changed on the Settings page, Voice announcements section.
Change configuration profile
The active configuration profile can be changed by calling the following IDs/callsigns:
- DMR, NXDN® and P25: ID 9000+configuration profile number. Example: to switch to config profile 1, start a short call to 9001. Both private and group calls are interpreted.
- D-STAR®: call is sent to
.......1
(7 spaces and the configuration profile number, replace dots with spaces), or DTMF code A is entered followed by the configuration profile number. - C4FM: Special command/cross mode private call DTMF code (by default it's *) is entered followed by DTMF code A, then the desired configuration profile number.
Connector status query
The currently active connector's status can be queried by calling the following IDs/callsigns:
- DMR, NXDN® and P25: ID 9998. Both private and group calls are interpreted.
- D-STAR®: call is sent to
.......I
(7 spaces and an I, replace dots with spaces), or DTMF code D or 0 is entered. - C4FM: Special command/cross mode private call DTMF code (by default it's *) is entered followed by DTMF code D.
The connector status will be announced by voice. The DMR/NXDN®/P25 connector status query ID can be changed on the Settings page, Voice announcements section.
Active IP address query
The active IP address can be queried by calling the following IDs/callsigns:
- DMR, NXDN® and P25: ID 9997. Both private and group calls are interpreted.
- D-STAR®: call is sent to
.......A
(7 spaces and an A, replace dots with spaces), or DTMF code B is entered. - C4FM: Special command/cross mode private call DTMF code (by default it's *) is entered followed by DTMF code B.
The IP address will be announced by voice. The DMR/NXDN®/P25 IP address query ID can be changed on the Settings page, Voice announcements section.
Battery status query
The battery status can be queried by calling the following IDs/callsigns:
- DMR, NXDN® and P25: ID 9996. Both private and group calls are interpreted.
- D-STAR®: call is sent to
.......B
(7 spaces and an B, replace dots with spaces), or DTMF code C is entered. - C4FM: Special command/cross mode private call DTMF code (by default it's *) is entered followed by DTMF code C.
The battery status will be announced by voice. The DMR/NXDN®/P25 battery status query ID can be changed on the Settings page, Voice announcements section.
Time query
The current device time can be queried by calling the following IDs/callsigns:
- DMR, NXDN® and P25: ID 9995. Both private and group calls are interpreted.
- D-STAR®: call is sent to
.......T
(7 spaces and an T, replace dots with spaces), or DTMF codes CD is entered. - C4FM: Special command/cross mode private call DTMF code (by default it's *) is entered followed by DTMF codes CD.
The current time will be announced by voice. The DMR/NXDN®/P25 time query ID can be changed on the Settings page, Voice announcements section.
D-STAR® unlink command
The openSPOT4 is designed to be always connected, however, the unlink (U) command is supported and activates the Null connector (which - as its name says - does not connect anywhere).
You can unlink if a call is sent to .......U
(7 spaces and a U, replace dots
with spaces), or DTMF code # is entered.