1.7 Busy Line/Busy Party Features
1.7.4.4Whisper OHCA
Description
An extension user can give a message to a busy extension through the handset.
Conditions
•COS programming determines which extensions can use this feature.
•This feature is available when the calling and called extension use one of the following telephones:
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•If the Whisper OHCA feature cannot be used due to COS or telephone type, the Call Waiting tone will be sent to the called extension. ( 
1.7.4.2 Call Waiting Tone)
•If the called extension does not use a
•It is possible to enable Whisper OHCA on any telephone. However, it may not work properly. (e.g., The voice may be heard by the other party.)
•While an extension is receiving Whisper OHCA, if the extension user places the current trunk call on hold or transfers the current intercom call or trunk call, the Whisper OHCA will become disabled and the calling extension will start to hear a ringback tone.
•While an extension is receiving Whisper OHCA, if the extension user places the current intercom call on hold, the called extension can talk to the calling extension through the handset.
