Norcon Communications
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Products > Corrections Series > TTU-5 Intercom

Monitoring the activities of inmates and patients in high security or sensitive areas requires a special kind of communication system. The intercom system must be sensitive enough to deliver clear, intelligible communications in high-ambient noise environments, it must be durable, and it must provide a measure of control for those responsible for the inmates or patients.

The Norcon TTU-5 is specifically designed for these conditions. It is enclosed in a pair of galvanized steel back boxes with stainless steel rectangular faces and intended for in-wall installations requiring flush-mounting and bullet-resistance.

How it Works
The TTU-5 incorporates the same high-quality electronics as the basic patented Norcon TTU-1 Talk-Thru system.

The microphone/speaker and controls are flush with the panel, assuring a tamper-resistant environment. The operator has access to recessed volume controls.

The unit with the controls goes on the corridor side; the other unit on the inmate or patient side. Simply connect the cable provided to the terminal blocks on the stainless steel plates, then fasten these plates to the back-boxes using the tamperproof screws and included tool.

The panel on the exterior (corridor) side is connected to a continuous-duty, 90-240 Volt AC power supply which is stepped down to 15 Volts.

TTU-5 systems are shipped complete with back-boxes, mounting hardware, instructions, and power supply.


  • Clear, 2-way hands-free voice communication
  • Provides ongoing activity monitoring as needed
  • Rugged, tamper-proof materials
  • Bullet-resistant option available (shield rated up to .357 Magnum service loads)
  • One year warranty on base unit (optional two years extended warranty available)

For purchasing information, please contact our sales department.

Click here for catalog cut sheet
Click here for installation and operations manual

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Mechanical Specifications
  • Steel back-boxes: 11 in. H x 3 in. W x 2 in. D
  • Face Plates: 0.0625 in. Stainless steel standard. (Other gauges available.) 13 in. H x 4 in. W
  • Weight: Depends on gauge and type of material.
  • Mounting: Back-boxes recessed in barrier wall.
  • Panel controls: Exterior (corridor) panel only - on-off switch, recessed listen volume, and recessed talk volume.
Electronic Specifications
  • Audio frequency response: Selectively shaped for maximum voice intelligibility
  • Audio power: 2 watts per amplifier
  • Distortion: Less than 2%
  • Listen mode: 20 dB compression
  • Talk mode: Vox
  • Microphones: Electret
  • Power supply: Input: 90-240 VAC, 60 Hz Output: 15 VDC, 1A. Level VI, UL & CE compliant switching power supply
Specifications are subject to change without notice.