Panasonic KX-TD816C User Manual page 178

Station Features and Operation (DPT/SLT)
<SLT>
• If another user tries to access an outside line from a looked extension, the user hears a
reorder tone.
• With the KX-T7431, KX-T7433, KX-T7436 or KX-T7235, you can execute this feature
using the display operation.
User Manual References
4.4.7 Remote Station Lock Control
4.5.9 KX-T7235 Display Features - System Feature Access Menu
4.5.12 KX-T7431 / KX-T7433 / KX-T7436 Display Features - System Feature Access Menu
178 User Manual