DPT Features 4-514.2 DPT Features CConference, UnattendedWhen you are in a conference with two outside parties, you can leave the three-partyconference allowing the other two parties to continue their conversation.To establish an Unattended ConferenceDuring a conversation with two outside parties;1. Press the CONF button to leave the conference.• An outside-to-outside line call between the other two partiesis established.To return to the conference1. Press the CO button flashing green moderately.To answer Hold Recall (To return to the conference on the line)While hearing Hold Recall;1. Lift the handset or press the SP-PHONE button, or pressthe CO button whose indicator light is flashing green rapidly.Conditions• When an Unattended Conference is established, an alarm tone is sent to both outsideparties fifteen seconds before the assigned duration time limit (default: 10 min.). “HoldRecall” is activated to the extension that leaves the conference fifty seconds before thetime out. The call is disconnected at the time out unless the extension returns to theconference.• If you are off-hook and hear “Hold Recall” during the Unattended Conference mode,the display flashes “CO 2 & CO 3”, for example, for five seconds at fifteen secondintervals.• Whether an extension is able to establish a “Conference, Unattended” depends on the“Class of Service*” assignment.Programming References• System Programming — Installation Manual[206] Outside-to-Outside Line Call Duration Time[503] Call Transfer to Outside Line[601] Class of ServiceFeature ReferencesConferenceHold Recall (→ see Installation Manual)* Class of Service (COS) is used to define the features which are allowed for a group of extensions.For more details, please consult with your dealer.1 CONF1 CO1or CO
