Making a voice call

You can make a voice call by sending the start_call command (with the phone_number parameter set to the number that you're calling) to the phone control object. Because this is a server object, to observe the response, you must force the shell to keep the file descriptor open. In the following example, we use the exec command to do this, then direct the response messages to stderr:

# echo 'msg::start_call\nid::1\ndat:json:{"phone_number":"nnnnnnnnnn"}\n'
> /pps/services/phone/private/control

If the command is successful, the response is:

res::start_call
id::1
dat:json:{"phone_number":"nnnnnnnnnn","line":"cellular","call_id":7,
 "call_type":"outgoing"}

To end the call, you must send the end_call command to the same PPS object, specifying the call_id given in the response to the start_call command:

# echo 'msg::end_call\nid::2\ndat:json:{"call_id":"7"}\n'
> /pps/services/phone/private/control

The response is:

res::end_call
id::2
dat:json:{"call_id":7}

The logging information shows the following activity:

• Starting of the voice call
• Network confirmation that the called number is ringing
• Audio is started
• Application receives a response to the start_call command, where call_id is included
• Voice call is connected
• Ending of the call (by the caller) through the end_call command
• Network confirmation that the call is disconnected
• Application receives a response to the end_call command
• Audio is stopped

Mar 25 10:22:22.715     qwf_phone_service.13807671             low_rate   3070  QWF_TR 
 Start call

Mar 25 10:22:26.662     qwf_voice_service.13815866             low_rate   3076  QWF_TR 
 NOTIFY_PHONE_RINGING, connID:1

Mar 25 10:22:26.728     qwf_phone_service.13807671            high_rate   3070  QWF_TR 
                   start_voice: Start audio succeed

res::start_call
id::1
dat:json:{"phone_number":"nnnnnnnnnn","line":"cellular","call_id":7,"call_type":"outgoing"}
  
Mar 25 10:22:30.069     qwf_voice_service.13815866             low_rate   3076  QWF_TR 
 NOTIFY_PHONE_CONNECTED, connID:1

Mar 25 10:22:47.356     qwf_phone_service.13807671             low_rate   3070  QWF_TR 
 End call

Mar 25 10:22:47.647     qwf_voice_service.13815866             low_rate   3076  QWF_TR 
 NOTIFY_PHONE_DISCONNECTED, connID:1

res::end_call
id::2
dat:json:{"call_id":7}

Mar 25 10:22:48.171     qwf_phone_service.13807671            high_rate   3070  QWF_TR 
                     end_voice: Stop audio succeed