Panasonic KX-NS1000 - 2.10.4.4 Whisper OHCA

Feature Guide References
5.1.1 Class of Service (COS)
User Manual References
1.2.4 When the Dialled Line is Busy or There is No Answer
1.9.7 Preventing Other People from Joining Your Conversation (Executive Busy Override Deny)
148 Feature Guide
2.10.2 Executive Busy Override