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Clear-Com TW-12C Clear-Com/RTS System Interface

Model: TW-12C

Clear-Com TW-12C Clear-Com/RTS System Interface
Clear-Com TW-12C Clear-Com/RTS System Interface
Clear-Com TW-12C Clear-Com/RTS System Interface
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About: Clear-Com TW-12C Clear-Com/RTS System Interface

TW-12C connects a single channel of intercom from one system to another. Opt isolation eliminates hums and buzzes. Compensates for level and impedance differences between systems. Allows Clear-Com-to-Clear-Com, Clear-Com-to-RTS, and RTS-to-RTS system configurations. Powered by the connected intercom system. Translates "call" signals in both directions.

Transparent Isolation Between Systems
The unique TW-12C completely eliminates hums and buzzes caused by ground loops. The TW-12C compensates not only for level differences between systems, but for varying impedances caused by transformers and capacitance on the lines.

The TW-12C provides an electrically isolated interface between the two intercom systems. Either "side" of the interface can connect to a Clear-Com intercom system or an RTS intercom system, allowing Clear-Com-to-Clear-Com, Clear-Com-to-RTS, and RTS-to-RTS combinations. In addition, the TW-12C passes through and translates "call" signals, Clear-Com-to-RTS and vice versa.

The interface consists of two identical, 2-wire-to-4-wire hybrid networks which break the ground loops that occur when two systems are run from separate power sources. The audio paths are transformer-coupled and the signaling circuits are opto-isolated.

Fast, Easy & Accurate Setup
The operator can quickly set up the TW-12C by using a standard intercom headset and the TW-12C's built-in setup tone. The TW-12C is capable of a range of null adjustments, allowing it to adapt to a wide variety of line conditions, line lengths, and impedances.

The TW-12C provides each side of the system with null adjustment controls that allow adjustment even when the system is operating. The rear panel of the TW-12C contains a pair of 3-pin XLR connectors (one male, one female) for each side of the interface.

Call Signal Translation
The TW-12C interface receives "Call" signaling in the appropriate form (DC level for Clear-Com, tone for RTS), decodes it, and passes it to the other side of the interface, via an optical coupler. The receiving side of the interface sends the signal appropriate for the connected intercom.

Each side of the TW-12C is powered directly by the intercom system to which it is connected. The unit draws about the same amount of power as a belt-pack. If either system is disconnected, the power loss immediately shuts down the associated electronics, eliminating any unwanted noises on the operating intercom side. The TW-12C front panel provides an LED power indicator for each side of the interface.


  • Eliminates grounding problems between intercom systems
  • Matches gain between systems
  • Provides system isolation for: Clear-Com toClear-Com; Clear-Com to RTS; RTS to RTS
  • Passes through and translates signaling
  • Provides superior hybrid nulling - up to 40dB
  • Setup tone allows adjustment during operation
  • Powered from connected systems
  • Uses just one rack space is a Canadian authorized Clear-Com retailer.

Reviews: Clear-Com TW-12C Clear-Com/RTS System Interface

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Warranty: Clear-Com TW-12C Clear-Com/RTS System Interface Warranty:

30 Days

Manufacturer's Warranty:

All Clear-Com brand systems and products, including wired and wireless belt packs, have a Limited Warranty of two years, with the following exceptions:

  1. Clear-Com headsets, handsets, microphones, UHF wireless IFB products, and the following DX and PRO products: AC850 Charger, BAT850 Battery, BAT41 and BAT850 batteries, HS12, headsets, remote antenna cables, SP10 Speaker, XLR Adapters and HS20-2 headsets have a Limited Warranty of one year.
  2. Cables, accessories, components and consumable items including the BP850 battery sled, Beltpack antennas, Beltpack configuration cable, HS4-2 Earpiece, RMK850 Mounting Kit, RAK850 Remote Kit, Beltpack pouch, DX headset extension cable, HS4-3 Earpiece, HSI6000, RMK200, Splitter/Combiner, WS200 Battery Sled, Foam inserts in travel case, CAT-5 cable, base antenna have a Limited Warranty of 90 days.
  3. Any Clear-Com product that has been classified as obsolete at the time of sale has a Limited Warranty of 90 days from sale and will be replaced with the same product or a sales credit will be issued, at the sole discretion of Clear-Com. 
  4. Clear-Com PRO 850 series wireless base station and Beltpacks have a Limited Warranty of three years.
  5. Clear-Com UHF WBS Analog wireless intercom systems have a Limited Warranty of three years.
  6. All software products, including Concert (Client and Server), ECS, EHX, Production Maestro Pro and Logic Maestro are warranted for one year and shall substantially conform to published specifications. The media on which the Software is furnished is warranted to be free of defects in material and workmanship (under normal use) for a period of one year.