Vertical Communications DSU and DSU II - Manual (Page 60)

4.11 Making A Subdued Off-Hook
Voice Announcement (SOHVA)
You can make a voice announcement to another station that is off-hook
and busy on a call (if the system is arranged to provide this feature).
Your telephone provides a SOHVA button for your use. The system
allows you to decide whether to deliver a SOHVA message or hang up
when you hear an intercom busy tone.
•
Make a SOHVA announcement using the SOHVA button
as follows:
1. Make intercom call and hear busy tone.
2. Decide whether to interrupt or not.
3. If you decide not to interrupt the called party, hang up.
—OR—
•
To interrupt, press SOHVA button and hear several quick tone
bursts,
1. Make announcement (busy tone means that the called telephone is
in speakerphone mode and you cannot make announcement, that
your SOHVA has been denied through system programming, or
that the called party has voice announce block enabled).
2. Wait on line for reply (called telephone may send non-verbal reply
to your display and then disconnect from your telephone).
NOTE: The caller cannot control how the announcement is received.
This depends upon the equipment used and class-of-service
programming.
Making Calls GCA70–245
4–10 LCD Speakerphone Reference Manual