Panasonic DBS 824 Manual page 308

FF3
Call Waiting/OHVA
Software Version CPC-S and CPC-M, Version 1 0 and higher
Address FF3 (ExtPort)# 8# (0
Description
This setting determines if an extension can receive Call Waiting and Offhook
Voice Announcement (OHVA)
Programming
Notes
Conditions Under Which the Tone Is Not Sent The Call Waiting
notification tone cannot be sent to an extension that has an absence message,
a held call, or the extension is engaged in a conference call
issued 3/l /95
or
FF3 (l-16 or l-24)# 8# (0 or l)#
Extension Port
CPC-S 1-16
CPC-M l-24
DBS 824-l O-400
Call Waiting/OHVA
3-11