Use this manual with the following models only.
All 1812 Telephone Intercom Systems with circuit board 1871-010 REV S or higher.
DoorKing, Inc. reserves the right to make changes in the products described in this manual
without notice and without obligation of DoorKing, Inc. to notify any persons of any such revisions
or changes. Additionally, DoorKing, Inc. makes no representations or warranties with respect to
this manual. This manual is copyrighted, all rights reserved. No portion of this manual may be
copied, reproduced, translated, or reduced to any electronic medium without prior written consent
from DoorKing, Inc.
1812-065-M-3-07
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