Conference calls can be started in three ways:
- During an outbound call
- During an inbound call
- You can also move participants from a normally bridged call to a conference call
During an outbound call
Use the HTTP call API: https://www.plivo.com/docs/voice/detailed-reference/api/call/make-a-call/
An outbound call can be triggered by a number or an endpoint. When the dialed party answers the call, the answer_URL of the API has to return a conference XML (see the example below) so as to put the dialed party to the conference room “My Room.”
During an inbound call
During an inbound call to a Plivo DID, the answer_URL of the application attached to the DID should return the conference XML (see below). This will add the caller to the conference room - My Room
From a normally-bridged call to conference call:
The participants of a normal call can be transferred from the bridged call to a conference call with the help of our transfer a call API (https://www.plivo.com/docs/voice/detailed-reference/api/call/transfer-a-call/)
To get the call_UUID of the live call and to needed to record the inbound call, please use one of these APIs:
What is the maximum number of participants allowed in a single conference?
A maximum number of 20 participants/members are allowed in a single conference room.