
UNIVERSAL DOOR ANSWERING SYSTEM
The V-2901A, Universal Door Answering System,
when used with Valcom Doorplate Speakers,
provides voice paging with handsfree reply to a door
from any telephone location. The V-2901A initiates
ring-in on the telephone system and sends a
confirmation tone to the door speaker. The individual
at the phone responding to the signal will determine if
access should be allowed. Pressing a programmed
code on the telephone dialpad or pressing the remote
button will unlock the door to allow admission. The
V-2901A also provides an alarm control output to
alert an alarm system of an unauthorized entry.
These instructions contain the specifications and
information necessary to install, operate and maintain
the Universal Door Answering System.
This equipment generates and uses radio frequency
energy and if not installed and used properly, that is,
in strict accordance with the instructions listed in this
User's Manual, may cause interference to radio and
It has been tested and found to comply with the limits
for a Class B Computing Device in accordance with
the specifications in Subpart B of Part 15 of the FCC
rules, which are designed to provide reasonable
protection against such interference in a residential
installation. If this equipment does cause interference
to radio or television reception, which can be
determined by turning off the equipment and seeing if
the interference stops, the user is encouraged to try
and correct the interference by one or more of the
• Reorient the receiving antenna.
• Relocate the equipment with respect to the radio
• Move the equipment further away from the radio
• Plug the equipment into a different branch
NOTE: The manufacturer is not responsible for
any radio or TV interference caused by
unauthorized modifications to this equipment.
Such modifications could void the user's authority
to operate the equipment.
Refer to Figure 1 for a simplified block diagram of a