O
Programming References
• System Programming — Installation Manual, Section 4
4.2.2 System - Numbering Plan
4.2.3 System - Class of Service
4.2.7 System - System Option
Feature References
Busy Station Signaling (BSS)
Call Waiting
Off-Hook Call Announcement (OHCA)
4-136
Station Features and Operation
4.3
Station Features and Operation
— (45) Call Waiting Set/Cancel
— Off-Hook Call Announcement (OHCA)
— (32) Whisper OHCA to extensions other than T74XX