General Information

Coaxial Type Apt. Video Monitor Station. White Color. Built-in Electric Buzzer Signal or optional Alphatone Chime Signal. Can be desk mounted with optional adaptor.
The Alpha Communications/S.T.R. VMH25WH (residential/commercial) series monitors are designed to meet virtually any requirement for video-intercom security.These attractive monitors are surface mounted right on the wall (without any backbox required). Monitors can be changed to desk mount with the addition of a model TZ25WH desk adaptor. For new construction applications, where a rough-in box is required, these monitors may be mounted over the optional model VBB flush housing.All VMH25 series monitors feature a crystal clear 4.0″ black and white flat screen monitor (measured diagonally), textured finish handset (to minimize scratches and fingerprints), electric buzzer signaling (adjustable), heavy duty coiled cord with strain relief and two (2) momentary button switches. These switches can be used for door release or other signaling functions, depending upon system configuration. A convenient ‘ON’ button enables you to activate the monitor, on demand, without waiting to be called from an entrance station.Front mounted controls for brightness, contrast and horizontal hold, make these monitors easy to adjust to your exact viewing requirements.With the addition of a low-cost Model R2007 Alphatone chime adaptor, you can easily change the electric buzzer to a modern warble chime tone sound (field replaceable).


4.0″ (diagonal) Crystal Clear Black & White video screen
Convenient Duplex Voice Operation
Easy Installation (surface or desk)
Clear Voice Fidelity using Electret Condenser Microphones
Rugged and Reliable. Simple to Operate
Monitor features quick disconnect wire harness
Low profile monitor protrudes only 2.25″ from wall
Monitors may be used with HT2006 multi-button handsets
No flush housing required

Dimensions: All VMH25 series monitors are 8.63″W (220mm) x 8.75″H (223mm) x 2.25″D (58mm). All dimensions shown are outside dimensions for the surface type monitor+handset, less the coiled cord.
Receiver: 50mm round, 45 ohms, Model HK1.
Microphone: Electret Condenser Type. MK1 series.
Push Buttons: (1) with Door Opener (KEY) symbol and (1) spare (Red Dot). Video \’ON\’ button.
Flush Box: Model VBB. 7.13″W (182mm) x 4.38″H (112mm) x 2.75″D (70mm) wall opening. Optional for new construction or other rough-in applications.
Desk Adaptor: Model TZ25WH (White). Optional.

The monitor station shall be Alpha Communications/S.T.R. VMH25WH (residential and commercial) type. Monitor shall be surface (or desktop) mounted. Monitor shall include a high quality 4.0″ flat screen. Monitors using mirrors or other non-flat type screens shall not be acceptable. Monitor handset shall feature electret condenser microphone for exceptional voice fidelity. Handsets that include carbon transmitter or other voice technologies shall not be acceptable. Handset shall have a textured finish and heavy-duty coiled cord. Handset shall include a door release (KEY SYMBOL) button and auxiliary (RED DOT) push button. Push buttons shall be clearly visible and shall be marked in a different color. Handset shall include an adjustable volume AC buzzer (or optional R2007 Alphatone chime adaptor). Front mounted controls shall be supplied for brightness, contrast and horizontal hold. A front-mounted ‘ON’ button will turn on the video when the button is depressed, and will timeout automatically.


VCUR6 Amplifier/Power Supply. (1) required to power 3 or less residential monitors. Installs in a separate central equipment location. Requires SS146 transformer for power.
VRU Auxiliary Power Supply. (1) required to power each additional 3 (or less) residential monitors, after the first (3) powered by the VCUR6. Installs in a separate central equipment location. Requires separate SS146 transformer for power.
VDU4 4-Port Video Distributor. 1 required for each 4 video risers/lines if there will be more than 1 video riser/line. Installs adjacent to VCUR6 amplifier/power supply.
DO-001 (or equivalent) 16VAC Door Release. Lobby Video Entry Panel (1 per building entry).
RC013 75-ohm End-of-Line Resistors. One (1) required at end of each video riser/line.
SS146 16VAC (40VA) Plug-in Transformer. U.L. Listed One (1) required for each VCUR6 and one (1) required for each VRU.

TU1007A Multi Entrance Audio Adaptor. Used when switching audio and door release between two to eight entrance stations. Used in addition to VCUR6 power supply. Use one (1) for (2) entrances, use two (2) for (3-4) entrances, use three (3) for (5-6) entrances and use four (4) for (7-8) entrances.
DPS-2 Multi Entrance Video Adaptor. Used when switching video between 2-8 entry panels. Used in addition to VCUR6 power supply. Use one (1) for (2) entrances, use two (2) for (3-4) entrances, use three (3) for (5-6) entrances and use four (4) for (7-8) entrances. Use in addition to the TU1007A audio switcher(s).
TZ25WH Monitor Desk Adaptor. Used when the monitor needs to be desk mounted.
PK407A Specialty Relay Adaptor. Used when connecting a door opener other than a 16VAC type to system. One (1) required for each building entry door opener.
R2007 Alphatone Signal Adaptor. Used in place of the standard buzzer supplied with each handset, to produce a warble tone sound instead of the buzzer sound. This unit is a field-installed item, installed by the contractor.
NOTE: Other components are required when substituting the HT2006 (multi-button) handsets, for the standard handsets, that come with these monitors. Please contact our sales department for assistance in putting together a video-intercom system using the HT2006 series handsets.

Inside monitor wiring (with standard HT2003 series handsets) shall be 5-common #22AWG, 2-common #18AWG and 1-RG59/U (all copper-minimum 95% braid) coaxial cable common. Add one (or more) additional common wires if the ‘Red Dot’ button on the handset will be used (or any additional buttons such as those on the HT2006 series handsets).

Rate this page