Feature Manual References3.1.21 COS (Class of Service)Operating Manual References1.3.11 Call Transfer1.3.49 PDN (Primary Directory Number)/SDN (Secondary Directory Number) Extension3.1.11 CALL WAITING FEATURESDescriptionUsed to inform a busy extension that another incoming call is waiting. The busy extension user can answerthe second call by disconnecting the current call or placing it on hold.The following notification method can be assigned for each extension depending on the call waiting and thetelephone type:a. Call Waiting Tone: Tone from the handset or built-in speakerb. OHCA: Voice from the built-in speakerc. Whisper OHCA: Voice from the handsetd. Off: No notification.Call TypeNotification MethodDPT IP-PT Other TelephoneIntercom Call Call Waiting tone/OHCA/WhisperOHCA/OffCall Waiting tone/Whisper OHCA/OffCall Waiting tone/OffCO Line Call*1 Call Waiting tone/Off*1 Including a doorphone call, call via an incoming call distribution group, and a CO line call transferred from another extension.Call Waiting is also known as Busy Station Signaling (BSS).Conditions• Automatic Call WaitingThrough system programming, it is possible to select whether a call waiting tone is automatically sent tothe extension when receiving CO line calls, doorphone calls, external sensor calls and hold-recall calls.Through system programming, it is also possible to select whether extensions will receive Automatic CallWaiting from intercom calls.• Call Waiting call for an extension in a VM group (DPT/DTMF) is not available.• Data Line SecuritySetting Data Line Security cancels the Call Waiting setting. (® 4.1.1 Data Line Security)• Caller InformationWith the Call Waiting tone, the caller’s information flashes on the display for five seconds, followed by a10-second pause, then flashes again for five seconds.• Call Waiting from the Telephone CompanyBesides the Call Waiting service within the PBX, the Call Waiting tone offered by an analog line from thetelephone company informs the extension user of another incoming CO line call that is waiting. He cananswer the second call by disconnecting the current call or placing it on hold using EFA. For details, consultyour telephone company.48 Feature Manual Document Version 2009-123.1.11 CALL WAITING FEATURES
