There are two type of call services:
Conference call – allows you to dial-in a pre-setup conference. Depending on the way the conference is set up, you might have to enter PIN number to be authorised. Once authorised, you start receiving updates on the status for each participants in the call. You can also add new members to the call.
They have Conf as suffix in the services.
Public call – Very similar to conference call, except you don’t dial-in. Instead, you initiate calls to a bunch of pre-registered numbers at once. This feature is very useful for conducting group meetings via phone.
They have Public as suffix in the services.
The following video shows how calls are made.
The call screen is a pretty standard and intuitive representation of calls.
The main view of the call screen lists record of participants that have been dialed or currently being dialed.
The call control panel allows features like terminating call, changing microphone and speaker settings; and adding extra participants to the call.
The big red button is used to the end the call.
The following video shows the rest of the process.
Releasing participants involves performing a long press on the call record. Upon long press, a small dialog presents the option for call release. The following video demonstrates this.
Finally, the following image shows what it looks like when calls are successfully participating in conference.