AT&T 3070 - Manual (Page 31)

Using a Dial Code
To page a zone using a dial code:
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Touch Intercom-Voice or Intercom-Ring.
Lift your handset.
Dial one of the following codes:
80 for all zones
81
zone 1
82 zone 2
83 zone 3
Intercom
Voice + +
loudspeaker
page
code
When you hear a beep, speak into your handset.
When you hang up, you turn off the loudspeaker.
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