Product Specification Sheet APS846

Rev. 11/2013

HT40 Series 2-Wire QwikBUS™ Loop Handsets

HT40W (White) Front View
HT40A (Anthracite) Angled View
HT40 Series 2-Wire QwikBUS™ Loop Handsets

The Alpha Communications® / S.T.R.™ HT40 QwikBUS™ Series handsets are designed to work as an apartment type handset intercom station, using a minimal of wiring. All HT40 handsets in a building can be wired on only two (2) common (loop) wires! Choose from White or Anthracite (Charcoal) colors. 

These attractive handsets easily surface mount right on the wall or over a single gang flush electrical back box (or plaster ring). Handsets can be changed to desk mount with the addition of a model TZ1003 series desk adapter.

All HT40 series QwikBUS™ handsets feature textured finish (to minimize scratches and fingerprints), electronic tone signaling, heavy duty replaceable coiled cord and (3) three momentary button switches. These switches can be used for door release, or other signaling functions, depending upon system configuration, as well as LED indication/programming.

  • Crystal Clear Enhanced Half-Duplex Voice Operation
  • Easy Installation - Only 2 Common (loop) Wires Required
  • Eavesdrop Privacy
  • Clear Voice Fidelity using Electret Condenser Microphones
  • Rugged and Reliable / Simple to Operate
  • Mounts Surface or Desk (with optional TZ1003 series adapter)
  • HT40 available in White or Anthracite (Charcoal) color


All HT40 series handsets are 3.35"W (86mm) x 7.35"H (187mm) x 1.85"D (47mm). All dimensions shown are for the surface wall type handset, less the coiled cord.

Microphone: Electret Condenser Type
Push Buttons: (1) with Door Opener (KEY) symbol and (1) spare (Round Dot), and (1) LED
Architects' And Engineers' Specifications
The 2-Wire handset station(s) shall be Alpha Communications® / S.T.R.™ QwikBUSHT40 (in White or Anthracite) color. Handset(s) shall be mounted (surface or desktop with optional adapter). Handset(s) shall feature electret condenser microphone for exceptional voice fidelity, and enhanced half-duplex voice. Handsets that include carbon transmitter or other lesser voice technologies, shall not be acceptable. Handset shall have a textured finish and heavy duty coil cord. Handset shall include a door release (KEY SYMBOL) button, auxiliary (ROUND DOT) push button and LED/programming pusbutton. Push buttons shall be clearly visible and shall be marked in a different color. Handset(s) shall include a built-in electronic call tone signal. Handset(s) shall require only two (2) common (loop) wires for system operation.

Contractor shall observe all local and national electrical and building codes.

Alpha Communications
42 Central Drive • Farmingdale • NY • 11735-1202 • Phone: (631) 777-5500 • Fax: (631) 777-5599
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.