Out of 17 Ratings

Owner's of the AT&T Conference Phone ATT993 gave it a score of 3.8 out of 5. Here's how the scores stacked up:
  • Reliability

    3.82 out of 5
  • Durability

    3.81 out of 5
  • Maintenance

    3.88 out of 5
  • Performance

    3.76 out of 5
  • Ease of Use

    3.56 out of 5
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Telephone operation
Basic operation
Auto redial
The telephone can automatically redial the last outgoing
number up to ten times, until the other telephone rings or
you cancel auto redial. Auto redial calls are made using
the speakerphone.
While the telephone is on hook, press (AUTO) REDIAL.
It dials the number in redial memory using the primary
line selected or automatic line selection if it is turned
on. (See Set a primary line on page 19 or Turn
automatic line selection on or off on page 20.)
— OR —
While the telephone is on hook, press a LINE button
to select a line. Then, press (AUTO) REDIAL. The
telephone dials the number in redial memory.
When the other telephone rings or the other party
answers, lift the handset, press SPEAKER or press
HEADSET to speak with the other party.
If the number dialed is busy, the telephone will disconnect.
The telephone will wait 40 seconds and redial the same
number up to 10 times.
To cancel auto redial at anytime, press (AUTO) REDIAL
again. Lifting the handset or pressing SPEAKER or
HEADSET while the telephone is redialing will also cancel
the auto redial feature.
NOTE: The (AUTO) REDIAL LED is on and the SPEAKER LED is
blinking while the redial feature is activated.