Vertical Communications DSU and DSU II - Manual (Page 113)

10.10 Subdued Off-Hook Voice Announce
(SOHVA) Button Programming
You can program a button at your station that may be pressed to enable
the delivery of a SOHVA call. With this SOHVA enable button you can
decide, after hearing a busy signal, whether the called party should be
interrupted in a SOHVA manner. If so, you can press the button and
complete the SOHVA call.
To program a SOHVA button,
1. Press INTERCOM ✳ ✳ 1.
2. Press desired programmable button.
3. Dial 8.
4. Press SPEAKER to end programming.
10.11 Group Listening Button Programming
Group listening allows others to listen to a conversation over your
telephone speaker while allowing the distant party to hear only that
conversation that is sent through the handset speaker.
To program a group listening button,
1. Press INTERCOM ✳ ✳ 1.
2. Press programmable button.
3. Dial 98.
4. Press SPEAKER to end.
GCA70–245 Programming Your Telephone
LCD Speakerphone Reference Manual 10–11