PanasonicHelp.com  LINE BUTTON

How do I program a button on my phone access a specific outside line?

KX-TDA, KX-TDE, KX-NCP & KX-TAW

 
With the handset down and the speakerphone off.

Press the PROGRAM key (PAUSE if you do not have a PROGRAM key)

Press the key you want to program
Dial 0
Dial the line number. 

For the TAW848 and TDA50 use 2 digits, such as 03 for line 3

For the TDA100 and TDA200 use 3 digits, such as 003 for line 3

Press the STORE key. (The key with AUTO DIAL above it and STORE below it)
Press the PROGRAM key (PAUSE if you do not have a PROGRAM key)