Panasonic KX-T7565 Benutzerhandbuch

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Operation
User Manual
85
 To cancel End-to-End DTMF Signalling mode
If the dial type of the line is assigned to DTMF, Tone Through mode is established 
automatically after the dialling sequence is finished and the call is established.
Tone Through button is effective during a call between two extensions or extension to 
outside.
Create or re-arrange a Tone Through button.
PT
Tone Through mode is cancelled.
During a conversation
Press Tone 
Through.
(Tone Through)