Panasonic DBS-2.3-400 Programming Manual page 356

Chapter 4. Ringing and Hunt Groups (FF4)
Timing For Delayed Ringing. Delayed ring timing -- the period of time that
passes before the system transfers the unanswered call -- depends on the CPC
version:
• CPC-AII (all versions); CPC-B Version 3.1 or higher: CO Delayed
• CPC-B Versions prior to 3.1: Call Forward-No Answer Timer -- FF1 3#
Page 4-24
Ring Timer -- FF1 3# 26# (0-15)#
19# (0-15)#
DBS Manual - Revised April 2000
Section 400-Programming
DBS-2.3/9.2-400