Section 700 - Operation Chapter 5. Key Telephone Features576-36-700 DBS 576 (USA) issued October 2000 5-39Hardware Requirements• A Conference Card (VB-44120) must be installed in the System in order to conference more thanthree parties.Related Programming• FF1-0-03: Extension COS (8-Party Conference)• FF3: Extension COSConsiderations• **If all the internal parties hang up, the conference call will be disconnected. If the internal partyremains 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-partyconference 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-partyconference card. If an 8-party conference circuit is not available, a fourth party cannot be addedto a conference.• Once an 8-party conference circuit is used, it continues to be used as long as the conferencecontinues.• An 8-party conference card supports up to four 8-party conference circuits. However, the cardmust be placed in cabinet slots 1, 5, or 9 to support more than one 8-party conference circuit (andjumpered accordingly).Directory NumbersDescriptionA Directory Number (DN) allows extension numbers to be used on a key basis. The same DN may beassigned to multiple keys on the same telephone and to keys on other telephones.When a telephone’s extension number is assigned to a key on the same telephone, it is considered aPrimary Directory Number (PDN). Up to three appearances of the PDN may be assigned to keys on akey telephone. This allows for multiple calls on the same DN.When a DN is assigned to an FF key on another telephone, it is considered a Non-Primary DirectoryNumber (NPDN). Up to three NPDN appearances of the same DN may be assigned to keys on atelephone. This allows calls to the DN to appear on multiple telephones. The calls ring in on aspecified basis - immediate, delayed, or no-ring.A telephone may only have one PDN (on up to three keys) but may have multiple NPDNs with up tothree appearances of any one NPDN.2. If you did not select the conference party that is giving busytone, reenter the conference by pressing the CONF key.CONF Members: X (where X = 4-7party conference) displays3. If you selected the conference party that is giving busy tone,hang up and then go off-hook again and press the CONFkey to reenter the conference call.CONF Members: Y (where Y = 4-6party conference) displaysAction Result
