Specifications

8
Door Sensor
When this contact is shorted (by opening the door,
gate, etc.) without a legitimate dialpad or remote key
press opening, this will initiate an alarm condition.
Refer to Figure 9 for typical connections.
Unauthorized Door Opening
During an alarm state, UDO (unauthorized door
opening) goes to ground, to signal a customer
provided alarm that an alarm condition exists. Refer
to Figure 10 for typical connections.
Remote Signaling (Alerting Device)
The V-2904 supplies contacts to allow an alerting
device to be connected to the system. These contacts
follow the ringing cycle and can be used to operate a
remote signaling device such as a bell, buzzer or
light. One device provides alert indication for the
entire system. Refer to Figure 11 for a typical
connection using these contacts.
Background Music Connections
Connect the low level (-10dBm nominal) output of a
music source to pin 29 (W/BR) and pin 4 (BR/W) of
the 66 block. Adjust input of the music source to a
minimum. Volume of the background music will be
regulated by the volume control of the V-2904.
Volume Adjustments
There are four volume controls on the V-2904. See
Figure 3 for location of these controls.
___ 1. Phone to Speaker: Adjusts speaker volume.
___ 2. Speaker to Phone: Adjusts talkback volume
from the speaker. IMPORTANT: Set this
volume at the lowest practical level.
Setting this control too high will increase
background noise without giving greater
talkback volume.
___ 3. All Call: Adjusts volume of all call
announcements at the doorplate speaker.
___ 4. Music: Adjusts Background Music volume
at the door speaker.
PROGRAMMING
General
NOTE: The V-2904 can be accessed via tone
dial systems and programming must be
performed with a tone dial set.
The V-2904 is designed to allow the user to program
its functions to meet the requirements of the specific
application. The V-2904 is, however, shipped from
the factory with all functions pre-set to default
settings. These default settings are listed in the
Program Chart.
It is strongly recommended that the default
settings be changed to suit the needs of the
situation. The settings of the Access Code and
Door Unlock Code, particularly, should be
changed to provide a more secure system.
The following instructions explain the procedures
required to program the codes for the V-2904.
Individual codes can be programmed per feature for
each station or per feature for the total system. After
each program change, a dial tone will be received
designating a proper entry.
Master Access Code
The Master Access Code allows entry to
programming as well as to the use of the system. It is
essential that this code remain confidential to
maintain the security of the system. The Access
Code can be 1 to 7 digits in length. The asterisk (*)
or number (#) signs can not be used in the access
code.
The default master access code is 1 2 3. To change
this code:
1. Lift handset and hear dial tone.
2. Press # # # on the dial pad.
3. Enter the old access code on the dial pad.
4. Press * * * on the dial pad.
5. Enter the new access code on the dial pad.
6. Press * * * again.
7. Will receive dial tone if programmed correctly.
Programming Functions
The following program instructions show the
access code for each function as 1 2 3. If a new
master access code is programmed prior to
programming the following functions, the new
access code would be substituted where the 1 2 3 is
shown.
These following codes cannot contain # as part of
their code.
Ring Pattern
When the doorplate button at a station is pressed, the
V-2904 initiates ring-in on the telephone system.
There are three ring patterns available.