Panasonic KX-TD500 User Manual page 136

Digital super hybrid system
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2.8 Using User-supplied Equipment
From any extension while talking to the doorphone
PT
5
C.Tone
Dial 5.
The door will be left open for five seconds (default). This setting can be changed by System
Programming.
To keep the door open for another five seconds, dial 5 again using a Panasonic
Proprietary Telephone.
If no one answers the doorphone call within 30 seconds, the call is cancelled.
136
On-hook.
SLT
C.Tone D.Tone
Press
switchhook.
5
C.Tone
Dial 5.
On-hook.
Operation

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