Conference

Connect multiple callers in a shared conference room with moderation and recording

The <Conference> element connects a caller to a conference room. Multiple callers joining the same conference name are connected together. Maximum participants per conference: 20.

For role-based multi-party calls with coaching, individual hold/mute, and AI agent support, see Multi-party Call.

Basic Usage

<Response>
    <Conference>my-conference-room</Conference>
</Response>

Python

from plivo import plivoxml

response = plivoxml.ResponseElement()
response.add(plivoxml.ConferenceElement('my-conference-room'))
print(response.to_string())

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Conference Attributes

Basic Settings

Attribute	Type	Default	Description
muted	boolean	false	Join muted (can still hear others)
enterSound	string	""	Sound on entry: beep:1, beep:2, or URL
exitSound	string	""	Sound on exit: beep:1, beep:2, or URL
maxMembers	integer	20	Maximum participants (1-20)
timeLimit	integer	86400	Max conference duration in seconds
hangupOnStar	boolean	false	Let member exit by pressing *
stayAlone	boolean	true	End conference if only one member

Moderation

Attribute	Type	Default	Description
startConferenceOnEnter	boolean	true	Start conference when this member joins
endConferenceOnExit	boolean	false	End conference when this member leaves
waitSound	URL	-	Audio to play while waiting for conference to start

Recording

Attribute	Type	Default	Description
record	boolean	false	Record the conference
recordFileFormat	string	mp3	Recording format (mp3, wav)
transcriptionType	string	-	Transcription type. Values: auto, hybrid, manual
transcriptionUrl	URL	-	URL to receive transcription
transcriptionMethod	string	POST	HTTP method for sending transcription results to transcriptionUrl. Values: GET, POST

Callbacks

Attribute	Type	Default	Description
action	URL	-	URL called when member leaves
method	string	POST	HTTP method for action
callbackUrl	URL	-	URL for conference events
callbackMethod	string	POST	HTTP method for callback
redirect	boolean	true	Redirect to action URL

DTMF

Attribute	Type	Default	Description
digitsMatch	string	-	DTMF patterns to report
floorEvent	boolean	false	Notify when member becomes floor-holder
relayDTMF	boolean	true	Transmit DTMF to all members

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Examples

Join Muted

Add participants who can listen but not speak:

<Response>
    <Conference muted="true">my-conference-room</Conference>
</Response>

Entry/Exit Sounds

Play beeps when participants join or leave:

<Response>
    <Conference enterSound="beep:1" exitSound="beep:2">
        my-conference-room
    </Conference>
</Response>

Use a URL to play custom audio:

<Response>
    <Conference enterSound="https://example.com/join-sound.xml">
        my-conference-room
    </Conference>
</Response>

The URL must return XML with Play, Speak, or Wait elements.

Moderated Conference

Create a “waiting room” where participants wait for the moderator:

Participant XML:

<Response>
    <Conference startConferenceOnEnter="false" waitSound="https://example.com/hold-music.xml">
        moderated-meeting
    </Conference>
</Response>

Moderator XML:

<Response>
    <Conference startConferenceOnEnter="true" endConferenceOnExit="true">
        moderated-meeting
    </Conference>
</Response>

When the moderator joins, the conference starts. When they leave, everyone is disconnected.

Record Conference

<Response>
    <Conference record="true" recordFileFormat="mp3"
                callbackUrl="https://example.com/recording-ready/">
        recorded-meeting
    </Conference>
</Response>

Python

from plivo import plivoxml

response = plivoxml.ResponseElement()
response.add(plivoxml.ConferenceElement(
    'recorded-meeting',
    record=True,
    record_file_format='mp3',
    callback_url='https://example.com/recording-ready/'
))
print(response.to_string())

With Transcription

<Response>
    <Conference record="true"
                transcriptionType="auto"
                transcriptionUrl="https://example.com/transcription/">
        transcribed-meeting
    </Conference>
</Response>

Exit with Action URL

<Response>
    <Conference action="https://example.com/conference-ended/"
                hangupOnStar="true">
        my-conference
    </Conference>
</Response>

Bridge Two Callers

Use conferences to connect two incoming callers:

First Caller:

<Response>
    <Conference waitSound="https://example.com/hold.xml">
        private-bridge-123
    </Conference>
</Response>

Second Caller:

<Response>
    <Conference>private-bridge-123</Conference>
</Response>

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Callback Parameters

Conference Action URL Parameters

Sent when a member leaves the conference:

Parameter	Description
ConferenceName	Name of the conference
ConferenceUUID	Unique conference identifier
ConferenceMemberID	Member’s ID in the conference
RecordUrl	Recording URL (if recorded)
RecordingID	Recording identifier

Conference Callback URL Parameters

Sent for conference events:

Parameter	Description
ConferenceAction	enter, exit, digits, floor, record
ConferenceName	Conference name
ConferenceUUID	Conference identifier
ConferenceMemberID	Member ID
CallUUID	Call identifier
ConferenceDigitsMatch	Matched digits (when ConferenceAction=digits)
RecordUrl	Recording URL (when ConferenceAction=record)
RecordingID	Recording ID
RecordingDuration	Duration in seconds
RecordingDurationMs	Duration in milliseconds
RecordingStartMs	Start time (epoch ms)
RecordingEndMs	End time (epoch ms)

Transcription URL Parameters

Parameter	Description
transcription	Transcribed text
transcription_charge	Cost of transcription
transcription_rate	Rate per minute
duration	Recording duration
call_uuid	Call identifier
recording_id	Recording identifier
error	Error message (if any)

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Related

• Multi-party Call — Role-based calls with coaching, AI agents, and advanced controls
• Recording — Record calls
• Call Routing — Dial, Redirect, Hangup