Intercom - CM491
General Information

Vandal-Resistant Panel. Natural Anodized Aluminum finish with metal pushbuttons and metal speaker grille. Alphabetical Directory is protected by polycarbonate.
The CM491 series Tek-Guard entrance panel is a directory style panel, for use with most open-voice (loudspeaking type) apartment intercom stations, up to a 20 button capacity. CM491 panels are equipped with a weather-resistant mylar cone speaker protected by a louvred style aluminum speaker grille, and solid aluminum pushbutton plungers with apartment markings permanently engraved, to resist vandalism. A built-in mini alphabetical directory module makes finding the tenant\’s pushbutton very easy. CM491 series panels are available for 4,8,12,16 or 20 buttons. For larger buildings, use our CM492 series modular style loudspeaking panels. All CM491 modules have a 45-ohm speaker and 4-20 buttons (in multiples of 4). All CM491 modules include a 20-name capacity mini directory which installs into the frame, above the speaker/button portion of the module. Directory strips can easily be inserted into the directory module using optional engraved plastic directory strips (model #TDS) and fill-in directory blanks (model #TDS-B). CM491 modules must be installed into an OF291 (flush) or OF291S (surface) panel frame. Flush CM491 panels require an OH191 flush housing. Surface CM491 panels do not require a backbox.


Vandal-Resistant with Metal Buttons and Metal Speaker Grille
Hands-Free Loudspeaking
Weather-resistant Mylar Speaker
Self-Wiping Pushbuttons
Permanently Engraved Metal Buttons
Built-in Mini Alphabetical Directory
Flush and Surface Models Available
Available with 4,8,12,16,20 Buttons
Compact Size – Only 6.25″ Wide (O.D.)

Dimensions: Height: 19.00″ (483mm)
Width: 6.25″ (159mm)
Depth: 4.00″ (102mm) (Flush OH191 Housing)
Projects: 2.25″ (58mm) (OF291S Surface Frame)
Construction: Anodized extruded aluminum panel/faceplate.
Pushbuttons: Individually replaceable plastic type with self-wiping contacts, with solid aluminum pushbutton plungers (Black Anodized), with apartment designations permanently engraved.
Speaker: 3.50″ (89mm) 45 ohm, mylar cone, Model #SK004/PL194 (with mounting plate).
Housings: Model OH191, for flush style OF291 frames only.

Entrance panels shall be Alpha Communications /Tektone CM491 Tek-Guard series or approved equal, and shall provide (4-20) pushbuttons in total (in multiples of 4). Panels shall be directory style, and shall include the CM491 speaker/button module, mini alphabetical directory module, as well as a weather-resistant mylar speaker behind a louvred style aluminum speaker grille. Pushbuttons shall be individually replaceable plastic type, with self-wiping contacts, with solid extruded aluminum pushbutton plungers in a black anodized finish. Apartment markings shall be permanently engraved into the pushbutton plungers. The mini directory module shall be protected by a clear sheet of polycarbonate plastic. The CM491 panels shall be provided with the appropriate OF291 (Flush) or OF291S (Surface) panel frame. Flush panels shall be supplied with the OH191 flush back box. Contractor shall provide a model S1 screwdriver, to the building management, for any future directory name replacement/maintenance required.


S1 Screwdriver (for installation/maintenance).
OF291S——OR——OF291——OR——OH191 Surface Panel Frame (no back box required)Flush Panel FrameFlush Housing–not required for surface panels–required for use with OF291 frame.

Depends upon apartment stations and amplifier being used.

Intercom – CM491
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