TS2N

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Rotary Switches, also known as rotary selector switches, are type of switches that are operated with a rotating knob. The switch is turned from one position to another to increase or decrease the amount of current, or to change the connection completely. Rotary Switches are commonly used in consumer electronics, for instance the volume control on a television or the channel selectors on stereo equipment. It is also used in industrial applications, such as the control panel on a machine, or to switch electrical supply from one circuit to another. However, the most common application of Rotary Switches is in telecommunications, specifically in the Telex Switch System 2N, abbreviated as TS2N.

The TS2N system is a 2-wire talk-back switch system designed to control the connections between multiple telecommunication terminals. It is capable of making up to 24 simultaneous connections and controlling the call conversation between the terminals. Each terminal is assigned a unique number in the system, and the system operates on a rotary action principle to create connections. The system functions by connecting terminals either on a one-to-one basis or by connecting them to a general broadcast line. The TS2N system includes a central control unit, four couple classes, twenty-four connect/disconnect devices, four common equipment lines, twenty reply lines and twenty-four pairs of talk lines.

Each couple class consists of two couple terminals, which are able to interconnect up to eight distinct sets of terminals. The forty-eight sets of couple terminals are connected via connector cables to the four common equipment lines. The four common equipment lines in turn are connected to each of the twenty-four connect/disconnect devices. These devices are responsible for making the connections between the terminals. Each of the connect/disconnect devices is fitted with four rotary switches, which are used to select the terminals that need to be connected.

The rotary switches are actioned by turning the rotary knob. Depending on the direction in which the knob is turned, either a connection is made or an existing connection is broken. The rotary switches are also used to select the terminals for broadcasting, by setting the switch position to \'broadcast\' instead of a specific terminal number. The system is also fitted with mechanical contact relays in order to enable it to detect a busy line and to restore the power to a disconnected line.

The TS2N system is highly reliable and efficient compared to other telecommunication systems of its time. It is also very cost effective, as the installation and configuration of the system is relatively straightforward, and the number of components required is small. It is still in use in many telecommunication networks and is an effective communication control system.

In conclusion, Rotary Switches are an integral part of the TS2N system, which is used in a variety of telecommunication applications. The rotary switches are used to make and break connections between terminals, as well as to broadcast information. They are also used in other applications such as industrial settings and for controlling volume and channel selection in consumer electronics. Rotary Switches are a reliable and cost-effective option for controlling switch systems such as the TS2N.

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