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Chapter 5. Key Telephone Features
Conference Calls
Description
Conference Calls allow you to add another party to an existing conversation. With the standard
system configuration, up to 4 parties can be included in a conference call at any one time. If the
optional Conference Card is installed, up to 8 parties can participate in a conference call.
Any combination of extensions and trunk lines can be in the conference as long as the original
extension is in the conference and the total number of parties does not exceed 8. Only one operation is
used to establish and add to a conference. You simply have to place the current call on hold, dial the
next party and press the CONF key. No different operation or access code is required to add
additional parties to the call.
When no optional conference card is installed, the system supports the following types of four-party
conference calls:
•
4 extensions
•
3 extensions and 1 CO line
•
2 extension and 2 CO lines
•
1 extension and 3 CO lines
Operation
See Section 750 - Key Phone User Guide for operating instructions.
Hardware Requirements
•
A Conference Card (VB-44120) must be installed in the System in order to conference more than
three parties.
Considerations
•
**If all the internal parties hang up, the conference call will be disconnected. If the internal party
remains in the conversation, the conference call remains in progress.
•
When three or four parties are conferenced, a built-in 4-party conference circuit is used. If no
4-party conference circuit is available, a conference cannot be established.
•
When a fifth party is added, the conference is moved to a conference circuit on the 8-party
conference card. If an 8-party conference circuit is not available, a fifth party cannot be added to
a conference.
•
Once an 8-party conference circuit is used, it continues to be used as long as the conference
continues.
•
An 8-party conference card supports up to four 8-party conference circuits. However, the card
must be placed in cabinet slots 1, 5, or 9 to support more than one 8-party conference circuit (and
jumpered accordingly).
•
During a conference call, the extension (EXT) lamp lights on the conference originator's
telephone.
•
When the conference call is placed on Conference Hold, the EXT lamp blinks on the conference
originator's telephone.
•
When the conference originator adds an extension or outside line to the conference, the MCO
key or VL (Virtual Line) key assigned to that party is turned off.
•
During a conference call hold, the held conference members cannot use the HOLD key. Pressing
the key has no effect.
148
S-ICX (International) issued April 2002
Section 700 - Operation
S-ICX-64-700
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