1.8 Busy Line/Busy Party FeaturesFeature Guide 1311.8.4.3 Off-hook Call Announcement (OHCA)DescriptionAn extension user can talk with a busy extension through the built-in speaker and microphone of the calledparty's PT. If the existing call is using a handset, a second conversation is made using the speakerphoneand microphone so that the called extension can talk to both parties.Conditions• COS programming determines which extensions can use this feature.• This feature is available when the called extension uses one of the following telephones:– KX-T7625, KX-T7630, KX-T7633, KX-T7636– KX-T7536– KX-T7436– KX-T7235 (except KX-T7235G/FR/SL/NE)• If the KX-T7235G/FR/SL/NE are connected to the PBX, the OHCA feature for theKX-T7235 should be disabled through system programming.• The OHCA feature cannot be used in the following cases:a) COS or called extension's telephone type is not available for this feature.b) The called extension (DPT) is connected to a PC (PC Console or PC Phone) via the USB Module.c) The called extension (DPT) is in the Digital XDP connection.The Call Waiting tone is sent to the called extension. (→ 1.8.4.2 Call Waiting Tone)• While an extension is receiving OHCA, if the extension user places the current trunk call on hold ortransfers the current intercom call or trunk call, OHCA will become disabled and the calling extensionwill start to hear a ringback tone.• While an extension is receiving OHCA, if the extension user places the current intercom call on hold,the called extension can talk to the calling extension through the handset.Programming Manual ReferencesPC Programming Manual2.8.10 [2-6-3] Numbering Plan—B/NA DND Call Feature→BSS / OHCA / Whisper OHCA / DND Override→BSS / OHCA / Whisper OHCA / DND Override-22.8.11 [2-7-1] Class of Service—COS Settings—CO & SMDR—OHCA / Whisper OHCAPT Programming ManualNoneFeature Guide References2.2.1 Class of Service (COS)User Manual References1.8.3 Receiving Call Waiting (Call Waiting/Off-hook Call Announcement [OHCA]/Whisper OHCA)
