Panasonic DBS 824 Manual page 277

Opener Relay Timer
Door
Software Version
Address FFl 8## 3# (DoorPhone)# 7# (O-5)#
Description
Use this address to determine the number of seconds a "buzzing" (unlocked)
door will remain unlocked for the door phone user to enter the building
Default is 4 seconds This timer begins immediately after the inside
extension (called party) enters the Door Opener Access Code to unlock the
door
Programming
Related Programming
Door Opener Access Code FFl 8# 3# (DoorPhone)# 3# (0000-9999)#
CPC-S and CPC-M, Version 1 0 and higher
Door Phone Number
Door Opener Relay Timer
Number of Seconds Door Will Remain Open