Matrix VISIONPRO System Manual 148
Conference
VISIONPRO offers the facility of 3-Party Conference calls. If a user is already talking to someone and wants to
include a third person in the current conversation, he/she can create a 3-Party conference.
Following three combinations are allowed in 3-party conference:
• All three stations.
• Two stations and one trunk.
• One station and two trunks.
It is also possible to conduct an Unsupervised 3-Party Conference, wherein the operator connects two trunks
through the system and withdraws himself/herself from the three-way speech.
Suppose you are at city A. Your two colleagues are at city B and city C. Now using this feature, you staying at City
A, can make a conference call with the persons in City B and in City C. After the conference is established and if
you disconnect, then the persons in City B and in City C will be in speech with each other.
• Unsupervised conference calls are same as the DOSA calls. The unsupervised conference call shall
get disconnected after time = DOSA Inactivity Timer + DOSA Wait Timer. Hence to continue the
unsupervised conference, it is mandatory for the user to dial any digit after the warning beeps. Refer
“Direct Outward System Access (DOSA)” for more details.
• To disconnect the call it is advisable to dial ‘#0’.
• VISIONPRO supports maximum 2 simultaneous 3-party conferences at a time.
How it works
A, B, C are stations.
3-Party Conference between stations
• A is in speech with B.
• A and B want to include C in their conversation.
• A puts B on Hold.
• A gets Feature Tone. B gets on-hold music.
• A dials C's station number. A gets Ring Back Tone.
• A is in speech with C.
• A dials Flash-0; a three-way speech is established.
• A, B, and C are now in a 3-party conference.
• Any of them can disconnect to withdraw from the conference.
• If C disconnects, A and B will be in a normal two-way speech.
• A and B can carry on the conversation or can have another conference with a trunk (external number) or
with a different station.
Similarly, a conference can be created including one station and a trunk or including two trunks.
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