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Troubleshooting Procedures
Table 7-1. Troubleshooting Procedures
Trouble
Possible Cause
Possible Solution
LED “off” constantly
Check power connection. If power connection is good,
then return for repair.
LED “on” constantly
Brown-out condition or software
Unplug and plug back in.
frozen.
LED blinking more than four
Internal software error; may still
Unplug and plug back in; if
times a second work.
problem continues return for
repair.
Talkback volume, but no
Volume control turned down or
Verify setting of controls and
speaker volume
DIP switches incorrectly set for
DIP switches.
mode of operation.
Speaker volume, but no
Volume control turned down.
Verify setting.
talkback volume
No page or talkback volume
Shorted or open speaker lead
Remove short or open.
connection.
Unit disconnects after a
Check forced disconnect
Change time-out (option
certain time time-out selection.
selection).
Dial tone heard from the
DIP switches incorrect for mode
Verify Mode of operation.
speaker
of operation. Telephone system
Program telephone system for
returns dial tone after Door no dial tone on this extension.
Phone goes on-hook.
Cannot hear your own voice
DIP switch incorrect.
Correct.
in telephone ear piece
Plugged wires into wrong jack.
Correct.
Station mode seizes line then
Forced disconnect timeout set
Enter Option Selection Mode
disconnects before AT&T
to low.
(##3), and enter new Forced
Door Phone Controller is
Disconnect Timeout Duration.
accessed
Station line plugged into J2. Correct, move to J1.
Cannot access AT&T Door
J1 and J2 swapped.
Check connections and correct
Phone Controller in trunk if needed.
saver mode
Getting door-ajar callback
Bad door ajar switch. Fix or adjust.
when door is actually closed
Open door ajar switch wiring.
Fix.
7-2 Troubleshooting and Maintenance