Section 700 - Operation
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 three-party
2 extensions and 1 CO line
1 extension and 2 CO lines
To establish a conference call:
1. While on a call, hookflash to place your current call on hold.
2. If adding an outside party, dial a trunk access code.
3. Dial the number of the party you wish to add to the call.
4. Hookflash when your call is answered.
5. To add additional parties, repeat steps 1-4
6. To drop out of the conference call, hang up.
A Conference Card (VB-44120) must be installed in the System in order to conference more than
FF1-0-03: Extension COS (8-Party Conference)
FF3: Extension COS
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 parties are conferenced, a built-in 3-party conference circuit is used. If no 3-party
conference circuit is available, a conference cannot be established.
When a fourth 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 fourth 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
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
DBS 576 (USA), issued January 1999
Chapter 7. SLT Features
• Outside dial tone