Telex 38109-977 manual Accessories, Wireless Intercom Examples

intercom system at some point. They can range from as simple as a single pair of units talking to one another, to a system in which 24 or more different portable units are dynamically switched between conversations.

Figure 1.3 Wireless Intercom Examples

Transmit to

Beltpacks

BTR-300

RadioCom

BTR-300

Transmit to

Base

Mirror Image Pair

Telex TR-500

TR-300 TR-300 TR-300 TR-300

Base Station with

4 Remotes

Wireless systems will vary tremendously worldwide, due to varying governmental radio regulations. What is common in America may be illegal in Japan, and may be unsuitable, for other reasons, in Germany. These units may be referred to by any of the types mentioned above, but, again, the unifying feature is the freedom from a wire.

Accessories

The fourth and final category is “accessories”. We are giving accessories its own separate category because of its importance. This book is addressing intercom systems. In all likelihood, many of the systems you encounter will be an amalgam of the three types mentioned above. Without “accessories” you cannot have a system, just a bunch of equipment.

To connect a TW system to a matrix system, a converter is required to change the combined talk and listen signal from the TW to separate talk and listen signals for the matrix – a hybrid provides this conversion.

C h a p t e r 1 - I n t e r c o m s — A n O v e r v i e w 3