TTU-3™ 6inch

There are times when it is impractical, for various reasons, to cut a 3-to-4-inch hole through an isolation barrier or to mount a communicator in a window or secure gate. But your employees and your customers still have a way to communicate clearly and calmly. In such cases, the Norcon TTU-3 is the communication system of choice. The prism shaped units of the TTU-3 are ideal for mounting on a counter top on both sides of a barrier. Yet they allow hands free communications through barriers typically found in banks, cashier's booths, information booths and similar environments.
The TTU-3 incorporates the same high-quality electronics as the basic Patent Pending (#4049911) Norcon TTU-1 Talk Thru system. It is a vox system, enabling the attendant and the customer to have hands free two-way communication.

The TTU-3 provides clear communication even in environments with high ambient noise by shaping the sound for maximum intelligibility. Its compression circuitry decreases loud, annoying sounds.

The TTU-3 Talk Thru Communicator now incorporates circuitry to automatically attenuate the outside channel. If the gooseneck microphone is not used for a period of 30 seconds, the outside channel volume will be reduced approximately 70%. Normal operation is restored as soon as the attendant speaks into the gooseneck microphone. The automatic volume attenuation circuit prevents outside noise from bothering the attendant.

The TTU-3 is equipped with a jack to add a headset or wireless headset. Simply plug the headset in and communicate. The headset contains lightweight construction, a boom mic and a single speaker that covers one ear.


The TTU-3 comes ready to operate. The prism units are quickly and easily mounted on the counter-top on opposite sides of the barrier. The unit can be positioned back-to-back (as shown), however, it is not required to mount the units against the barrier. The unit can be mounted at a convenient location for the user. A power adapter and all cables are supplied. The TTU-3 is supplied with a continuous-duty, 117-Volt power supply that is stepped down to 15

To order please call 802-824-9808 or send and email to .(JavaScript must be enabled to view this email address).


TTU-3™ 6inch Diagrams



  • Clear 2-way hands-free voice communication.
  • Quality electronic design and engineering.
  • Avoids shouting, repetition, misunderstanding.
  • Rugged, tamper-resistant materials.
  • Simple, one-person installation. No need to cut a hole in the barrier.
  • Compact, contemporary design. Fits any décor.
  • Export models available.
  • Units available for ADA applications.
  • Made in U.S.A.
  • Built in jack for headset.



  1. Audio frequency response:
  2. Selectively shaped for maximum voice intelligibility.
  3. Audio power:
  4. Watts per amplifier (2 amplifiers)
  5. Distortion:
  6. Less than 2%
  7. Listen mode:
  8. 20 dB compression
  9. Talk mode: Vox
  10. Microphones: Electret
  11. Power supply:
  12. Input: 120 VAC, 60 Hz
  13. Output: 15 VDC, 175 mA
  14. Other input power is available upon request.


  1. Outside assembly: 6 in. W x 2 3/8 in. H x 2 3/8 in. D. Machined aluminum, clear anodized finish, tamper resistant. Weight: 2 LBS.
  2. Inside assembly: 6 in W x 2 3/8 in. H x 2 3/8 in. D. Machined aluminum, clear anodized finish, tamper resistant. Weight: 2 LBS.
  3. Mounting: Countertop
  4. Inside assembly Panel Controls: Listen volume, Talk volume, power on/off, LED power indictor.

specifications are subject to change without notice.

Talk Thru Systems are shipped complete with cables, instructions, and power supply.

Other models available

TTU-1A Continuous power unit complete. Housing depth is 2 ½ in.

TTU-1AB same as TTU-1A, but with bullet-resistant option (UL Level 1 or 3).

TTU-1AJ same as TTU-1A, but with a removable gooseneck microphone.

TTU-1AB same as TTU-1AJ, but with bullet-resistant option *UL Level 1 or 3).

TTU-1D Battery operated unit complete with rechargeable batteries and charger. Housing depth is 3 ½ inc.

TTU-1DB same as TTU-1D, but with bullet-resistant option (UL Level 1 or 3).

TTU-1DJ same as TTU-1D, but with a removable gooseneck microphone.

TTU-1DJB same as TTU-1DJ, but with bullet-resistant option (UL Level 1 or 3).

TTU-HS Headset for TTU products.

TTU-3 Standard model same as the TTU-3 6 inch but 12 ½" long.

Talk Thru systems are shipped complete with cables, instruction, and power supply. Mounting hardware is not included.


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