Panasonic KX-TDE100 User Manual page 39

Using a Preprogrammed Number (Quick Dialling)
You can make a call simply by pressing the preprogrammed number for quick dialling.
PT/SLT/PS/SIP Extn. PT and SLT
Off-hook.
•
This is a useful feature for hotels.
For example, to dial Room Service, dial the digit "3", not the full extension number.
quick dialling no.
Dial quick dialling
number (max. 8 digits).
1.2.2 Easy Dialling
User Manual 39