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
of 79
Getting started
Optional spare battery
You can purchase a 9V alkaline battery and keep it in the spare battery
compartment of the telephone base at all times. In the event of a power
failure and with the optional spare battery installed in the telephone, all the
telephone functions will work normally until the battery needs to be replaced.
Remove the mounting bracket from the underside of the telephone base.
Press the tabs in the direction of the arrows and pull the mounting bracket
away from the telephone base.
Press the tab and pull to remove the battery compartment cover. Insert
one new 9V alkaline battery (purchased separately) following the polarity
markings in the battery compartment.
Replace the battery compartment cover.
If the telephone is to be mounted on a wall, turn to Wall mounting on
page 13.
— OR —
If you are using the telephone on a table or desk, turn to Telephone
installation on page 10.
NOTE: If you do not have a spare battery (optional) already installed during a power failure,
you will only be able to make and receive calls from the handset. The ringer will not work
until the power is restored.