Two (Tandem) CO Line Connection
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68
UST DK Electronic Telephone
➤
To connect two outside lines (using a
button)
1. Press
...or
and dial a
telephone number.
You hear dial tone.
2. After the party
answers, press
.
You hear dial tone. The CO LED flashes (conference rate). The
new CO LED flashes (in-use rate).
3. Press another
...or
and dial a
telephone number.
On some systems, you can press
and dial a CO
Line access code in step 3 and then dial a telephone number. It
is not necessary to have both
buttons on your telephone.
4. Press
after the party
answers.
...or the original
button if you receive a
busy tone/no answer.
The CO LEDs both flash (in-use rate) and all parties are
conferenced.
5. Press
and hang up.
You hear dial tone. Both CO LEDs
continue to flash (exclusive-hold rate)
and the two lines are connected.
N1
and
N2
identify the connected CO
lines.
The LED turns OFF when the parties hang-up.
Note
If the public telephone company provides auto
disconnect, the connection may release automatically
when the parties hang up. If not, the lines must be
supervised to be disconnected.
TRK-TRK N1 N2
JAN 10 THU 11: 57