Station Features and Operation (DPT/SLT)
User Manual 179
[820] Doorphone Ringing Time
[990] System Additional Information
User Manual References
2.2.2 Flexible Button Assignment
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