Panasonic KX-TDA100 Features Manual page 106

1.8 Toll Restriction (TRS)/Call Barring (Barring) Features
4) Walking COS/Verified Code Entry
(
5) Extension Lock
Feature Guide References
1.5.5.3 Trunk Access
1.6.1.5 Speed Dialling—Personal/System
1.8.3 Extension Lock
1.9.1 Automatic Route Selection (ARS)
2.2.4 Time Service
106 Feature Guide
1.8.5 Walking COS, 1.8.6 Verified Code Entry)