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
When making or answering a call, the timer automatically
starts. For outgoing calls, the timer starts when dialing.
The screen displays the elapsed time in minutes and
seconds (up to 59:59) and then displays the hours and
minutes up to 10 hours (09:59) before starting at 00:00
again. The timer stops automatically when the line is
disconnected. When you put a call on hold, the timer
remains on the screen.
Handset/Speakerphone/Headset volume control
When you are on a call, press VOLUME to increase
the listening volume. Press VOLUME to decrease the
listening volume. The speakerphone has eight volume
levels. The handset and headset have four levels.
There are three beeps when you reach the minimum or
maximum level.
Ringer volume
The ringer volume for each line can be adjusted
independently. If a LINE button has been pressed, volume
adjustments will affect the selected line. If no line is
preselected, volume adjustments will affect the primary
line programmed (see Set a primary line on page 19).
If one line is ringing, volume adjustments will affect the
ringing line.
Press VOLUME or VOLUME to adjust the ringer
volume. This telephone has eight ringer volume levels,
including off. Each time you adjust the ringer, there is a
sample ring indicating the volume level.
NOTE: The phone has default distinctive ringing for line 1 and line 2
which can not be changed.