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2.Press SCROLL s/t to search for the desired stored number. The selected number appears on the display.

3.Press ENTER. The phone dials the stored number.

Method 3

1.With POWER set to ON and the TALK key not lit, press SCROLL s/t to search for the desired stored number.

2.Press TALK. The phone dials the number automatically.

Chain Dialing

When storing numbers for special ser- vices (such as alternate long distance or bank-by-phone), store the service’s main phone number in one memory lo- cation and numbers for additional in- formation in other memory locations.

To chain dial memory numbers, follow these steps.

1.With the handset’s power on, press MEMORY and the memory- location number for the service’s main number. The numbers appear.

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2.Wait for the service to answer.

Note: If you use pulse dialing to dial the service, be sure you have stored a * (tone) entry in the mem- ory location you use to send the additional information.

3.Press MEMORY and the numbers for the memory location where the additional information is stored. The numbers appear.

4.To disconnect the call, press TALK so the TALK key does not light.

Testing Stored

Emergency Numbers

If you store an emergency service’s number (police, fire, ambulance) and you want to test the stored number, make the test call during the late evening or early morning to avoid peak demand periods. Remain on the line to explain the reason for your call.

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Radio Shack ET-543 owner manual Chain Dialing, Testing Stored Emergency Numbers
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ET-543 specifications

The Radio Shack ET-543 is a noteworthy addition to the realm of portable electronic technology, particularly in the category of handheld calculators and educational tools. Launched during a vibrant era of innovation, the ET-543 encapsulates the spirit of the late 20th century, when personal computing and digital gadgets became increasingly accessible to the general public.

At its core, the ET-543 features a natural display that allows for easy viewing of calculations, making it user-friendly for both novices and seasoned users alike. The device is equipped with a combination of mathematical functions that streamline computations ranging from basic arithmetic to more complex algebraic operations. This wide array of capabilities makes the ET-543 an ideal choice for students and professionals who require a reliable tool for everyday calculations.

One of the standout technologies of the ET-543 is its robust memory function, which allows users to store multiple calculations for later use. This feature is particularly beneficial for users who engage in repetitive tasks or require a quick reference for previously calculated values. Coupled with its programmable functions, the ET-543 presents a versatile platform that can accommodate a range of mathematical needs.

In terms of design, the Radio Shack ET-543 boasts a compact and lightweight form factor, making it highly portable. This characteristic is essential for users who need a dependable calculator on the go, whether in the classroom, workplace, or during travel. The button layout is intuitive, allowing for easy navigation through various functions without the need for extensive training.

Another important aspect of the ET-543 is its educational value. The device serves as a practical teaching aid, helping students grasp fundamental concepts of mathematics and computation. Its durability and ease of use ensure that it stands up to repeated use in educational environments.

In summary, the Radio Shack ET-543 is more than just a calculator; it embodies the fusion of technological innovation and user-centric design. With features tailored to meet a variety of mathematical challenges, coupled with its portability and educational utility, the ET-543 remains a symbol of practical technology that resonates with users across generations.
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