General Features108 Features GuideDoor OpenerDescriptionAllows the extension users to unlock the door for a visitor from their telephones. The door canbe unlocked by extension users who have been programmed to receive doorphone calls.However, while engaged on a doorphone call, any extension user can open the door from thetelephone to let the visitor in.Conditions• An optional Doorphone Card must be installed.• It is necessary to install a user-supplied door opener on each door to be opened. Two or fourdoor openers can be installed. System Connection *1 provides for four or eight door openers.• The door opener will open the door even if a doorphone is not installed.• The system can modify the door opener timer from 5 seconds (default) to 3 seconds byprogram "[990] System Additional Information, Area 10 - Bit 12".Connection References• 2.4.9 Doorphone and Door Opener ConnectionProgramming Guide References• [100] Flexible Numbering• [607-608] Doorphone Ringing Assignment —— Day / Night• [990] System Additional InformationFeatures Guide References• Doorphone CallUser Manual References• 4.3.39 Doorphone Call*1 Available for the KX-TD1232 only.