Panasonic DBS-2.3-400 Programming Manual page 167

Section 400-Programming
Related Programming
Extension (BLF) Delayed Ring: FF1 2# 1# 30# (0 or 1)#
Extension Delayed Ring Table: FF4 8# (ExtPort)# (ExtPort)# (0 or 1)#
Notes
Extension Delayed Ring Control in Older CPC-B Versions. In CPC-B
versions prior to 3.1, extension delayed ringing is controlled by the Call
Forward-No Answer Timer (FF1 3# 19# 0-15#).
DBS-2.3/9.2-400 DBS Manual - Revised April 2000
Chapter 1. System Programming (FF1)
Page 1-123