Panasonic KX-TDA30 Features Manual page 207

1.19 Proprietary Telephone (PT) Features
Feature Guide References
1.2.2.2 Group Call Distribution
1.2.2.7 Log-in/Log-out
1.3.1 Call Forwarding (FWD)/Do Not Disturb (DND)
1.12.1 Call Hold
1.13.1.2 Conference
1.13.1.3 Privacy Release
Feature Guide 207