Comdial DSU II Digital Expandable Systems User Manual page 23

GCA70-246
To camp on when you hear a busy signal,
1. MAKE intercom call AND HEAR busy signal.
2. DIAL
3. Remain on line awaiting a reply.
4. The called party will hear a short tone burst. They can either
place their current call on hold or hang it up and then answer your
call.
To Wait For
Callback...
...Dial
and Disconnect
Single Line Proprietary Telephone Station User's Guide
.
BUSY
To Send Call
Waiting Tone...
S 6
...Dial S
Wait For Reply
Busy station
When idle,
hears tone
your call
and may respond
is connected.
or ignore.
Busy
Station
Camping On Options
Your
Station
NO ANSWER
To Wait For
Callback...
01 and
...Dial
and Disconnect
When any activity
occurs at station,
your call is
connected.
Idle
Station
Making Calls
S 6
17