1.1 Incoming Call Features22 Feature Guide1.1.3.5 Call WaitingDescriptionA busy extension user can be alerted to a new call by Call Waiting. The busy extension user can then answerthe second call either by disconnecting the current call or placing it on hold. If Call Waiting is enabled, a call waiting tone will be sent to the user under the following conditions:a) When an outside (CO) line call or a doorphone call is received, orb) When another extension executes the Busy Station Signalling (BSS) feature.If disabled, a reorder tone will be sent to the extension that executed the BSS feature.Call Waiting from the Telephone CompanyBesides the Call Waiting feature provided by the PBX, you can also subscribe to your telephone company'sCall Waiting service and receive call waiting tones through the telephone company's lines. This feature isavailable when an extension is in a conversation with an outside party, and a call is received from anotheroutside party on the same outside (CO) line. The external call waiting tone will alert an extension user ofthe incoming outside (CO) line call that is waiting. The user can answer the second call by disconnectingthe current call or placing it on hold. If a call waiting tone is heard but the corresponding CO button does notflash, this tone is an external call waiting tone from the telephone company. For details, consult yourtelephone company.Conditions• Data Line SecurityWhen an extension user activates Data Line Security, Call Waiting is turned off ( 1.10.5 Data LineSecurity).• Call Waiting ToneA proprietary telephone (PT) user can select the preferred call waiting tone through personalprogramming (Call Waiting Tone Type Selection).• Caller ID InformationWhen an extension receives a call waiting tone, the caller's information will flash on the display for 5seconds at 15-second intervals.Feature Guide References1.7.3 Call Waiting Tone4.2.1 Tones/Ring TonesUser Manual References1.2.4 When the Dialled Party is Busy or There is No Answer1.4.4 Answering Call Waiting1.7.3 Receiving Call Waiting3.1.2 Changing Personal Settings Using Programming Mode