Conference Features

2.14.1 Conference Features—SUMMARY

Description

A conference call allows a conversation between three or more parties simultaneously. The following features are available to establish a conference call:

Feature Description & Reference

Conference During a two-party conversation, an extension user can add other parties to establish a conference call with up to eight parties.

® 2.14.2 Conference

Executive Busy Override An extension user can interrupt an existing call to establish a three-party conference call.

® 2.10.2 Executive Busy Override

Privacy Release During a conversation with an outside party on the S-CO button, a PT/PS user can allow another extension to join the conversation.

® 2.14.3 Privacy Release

Conditions

• Each PBX can support a maximum of 72 parties engaged in conference calls simultaneously. (Each conference call supports a maximum of 8 parties.) For example, a PBX can support 9 eight-party conferences (72 parties), 6 three-party conferences + 13 four-party conferences (70 parties), etc.

• DSP Resource Usage

A conference call requires a certain number of DSP resources. If all DSP resources are in use, this operation cannot be performed. To ensure a minimum level of performance, DSP resources can be reserved for conference calls. (® 5.4.4 DSP Resource Usage)

PC Programming Manual References

9.32 PBX Configuration—Configuration—DSP Resource

2.14.2 Conference

Description

An extension user can establish a conference call by adding additional parties to an already existing two-party conversation. This PBX supports three-party through eight-party conference calls. Conferences with more than four parties are only possible when a PT or PS user originates the conference.

Unattended Conference:

The conference originator can leave the conference and allow other parties to continue. Establishing an Unattended Conference allows the originator to return to the conference. Unattended Conferences can only be established by PT and PS users.

Conditions

• When an extension is establishing a conference call the original party is put on hold.

• CONF (Conference) Button

For a PT/PS which does not have the CONF button, a flexible button can be customised as the Conference button.

• Unattended Conference Call Duration

The length of time that a conference call can remain unattended is restricted by the following timers:

– Callback Start Timer – Warning Tone Start Timer – Disconnect Timer

These timers behave and operate according to the following chain of events:

1. When the unattended conference is established, the Callback Start Timer will begin.

2. When the Callback Start timer expires, the Unattended Conference originator’s extension will start to receive a callback ringing from the PBX and the Warning Tone Start Timer begins.

3. When the Warning Tone Start Timer expires, the remaining parties of the conference will start to hear a warning tone, the callback ringing will continue to be heard at the Unattended Conference

originator’s extension, and the Disconnect Timer begins.

4. When the disconnect Timer expires, the conference is disconnected.

If the Unattended Conference originator returns to the conference before the line is disconnected, all timers are cleared.

• If the originator of a conference with two trunks leaves the conference, the call can become a trunk-to-trunk call, if enabled through system programming.

– When a trunk-to-trunk call is established, the call will end when the Trunk-to-Trunk Call Duration timer has elapsed (® 2.11.8 Trunk Call Limitation). The timer applied is that of the trunk group containing the trunk being used for the call immediately preceding the conference. The timer cannot be extended.

– If both trunks are analogue trunks, the end of the trunk-to-trunk call may not be detected. For this reason, if analogue trunks are used, it is not recommended to enable the establishment of trunk-to-trunk calls after a conference call through system programming.

• When a KX-UT series SIP phone is used to originate a conference and one of the other parties leaves the conference, the KX-UT series SIP phone user will still be able to talk to the remaining party but will not be able to use the standard Hold feature.

PC Programming Manual References

10.3 PBX Configuration—System—Timers & Counters—DISA / Door / Reminder / U. Conf

→ Unattended Conference—Recall Start Timer

→ Unattended Conference—Warning Tone Start Timer

→ Unattended Conference—Disconnect Timer

10.7.1 PBX Configuration—System—Class of Service—COS Settings—CO & SMDR— Transfer to CO 10.9 PBX Configuration—System—System Options—Option 2— CO - CO Call Limitation—After Conference

10.9 PBX Configuration—System—System Options—Option 3

→ Confirmation Tone—Tone 4-1 : Start Conference

→ Confirmation Tone—Tone 4-2 : Finish Conference

→ Echo Cancel—Conference

12.1.4 PBX Configuration—Extension—Wired Extension—Flexible Button— Type 12.2.3 PBX Configuration—Extension—Portable Station—Flexible Button— Type

Feature Guide References

2.21.2 Flexible Buttons

6.1 Capacity of System Resources

User Manual References

1.4.5 Multiple Party Conversation

2.14.3 Privacy Release

Description

By default, all conversations which take place on trunks, extension lines and doorphone lines are protected by privacy (Automatic Privacy).

Privacy Release allows a PT/PS user to suspend Automatic Privacy for an existing trunk call on the S-CO button in order to establish a three-party call.

System programming is required to enable or disable this feature.

Conditions

• S-CO Button

A flexible button can be customised as the S-CO button.

• Privacy Release Time

Privacy is released for five seconds to allow the conversation to be joined.

• This feature overrides Data Line Security (® 2.11.5 Data Line Security) and Executive Busy Override Deny (® 2.10.2 Executive Busy Override).

PC Programming Manual References

10.9 PBX Configuration—System—System Options—Option 1— PT Operation—Privacy Release by SCO key

12.1.4 PBX Configuration—Extension—Wired Extension—Flexible Button— Type 12.2.3 PBX Configuration—Extension—Portable Station—Flexible Button— Type

Feature Guide References

2.21.2 Flexible Buttons

User Manual References

1.4.5 Multiple Party Conversation