Panasonic DBS 824 Manual page 337

Software Versiun CPC-S and CPC-M, Version 1 0 and higher
Address FF3 (ExtPort)# 36# (002)#
Description
This address determines which tone an extension user will hear when dialing
another extension that has a busy ML key
The tone selected in this address will be heard only if the called party has
more than one ML key and one of the ML keys is busy
Programming
Related Programming
3-40
FF3 (l-l 6 or l-24)# 36# (012)#
Extension Port
CPC-S 1-16
CPC-M l-24
NOTE Enter the extension port that will hear the tone (the calliq
party) -- not the extension with the ML keys (the called party)
DBS 824- 1 O-400
FF3
Issued 3/l /95