17-1111.fm Page 45 Wednesday, July 21, 1999 2:23 PM

SECURITY FEATURES

LOCKING YOUR PHONE

To prevent unauthorized use of your phone, you can enter a 3-digit code to lock your phone at any time (see “Using Manu- al Lock”). For added convenience, you can also set the phone to automatically lock every time you turn it on (see “Using Automatic Lock” on Page 46).

When the phone is locked, Locked appears when you press any key (except PWR ). When the phone is locked and re- ceives a call, it rings or vibrates as usual. To answer the call, you must enter the lock code and then press SND.

Your phone’s preset lock code is 123. For added security, you can change the code to one that you can easily remem- ber. See “Changing the Lock Code” on Page 46.

Note: If you lock your phone then forget the lock code, you can enter a 6-digit security code to display the lock code. See “Displaying the Lock Code” on Page 47.

Using Manual Lock

Follow these steps to lock or unlock your phone at any time.

1.Press FCN , then hold down JKL 5 until the phone dis- plays Lock?.

2.To lock your phone, press STO within 8 seconds. Locked appears and the green power/lock indicator lights steadily.

To exit without locking the phone, press END.

Note: If you do not press STO within 8 seconds, your phone automatically exits the lock program without lock- ing the phone.

45

Page 45
Image 45
Radio Shack CT-502 owner manual Security Features, Locking Your Phone, Using Manual Lock

CT-502 specifications

The Radio Shack CT-502 is a remarkable device that stands out in the world of vintage technology, particularly known for its versatility and functionality as a portable computer. Launched during a time when personal computing was rapidly evolving, the CT-502 embodies the spirit of innovation that characterized the early days of computing technology.

At its core, the Radio Shack CT-502 comes equipped with a Zilog Z80 microprocessor, a staple of many early personal computers that provided solid performance for its time. This CPU offers an 8-bit architecture with a clock speed of 2.5 MHz, allowing users to execute tasks efficiently. The CT-502 features a memory capacity of 64 KB of RAM, which can be expanded, making it suitable for various applications, from basic text processing to simple programming tasks.

One of the standout features of the CT-502 is its dual built-in floppy disk drives, which enable users to easily load and save data. This was particularly advantageous during the era when storage solutions were evolving, as it allowed for quick access to programs and files. The 5.25-inch floppy disks used by the CT-502 became a standard for many personal computing applications, ensuring wide compatibility with software.

The device also features a compact, built-in keyboard that boasts a full set of function keys, essential for efficient data entry and navigation. Complementing the keyboard is a 40-character by 24-line monochrome display, which provides a clear view of text and applications, ideal for programming and document creation.

In terms of connectivity, the CT-502 includes a variety of ports such as serial and parallel interfaces, allowing users to connect external devices like printers and modems. This functionality enhanced the versatility of the system and integrated it into the growing network of computers.

Moreover, the Radio Shack CT-502 runs on the TRS-DOS operating system, designed specifically for the TRS line of computers. This operating system was user-friendly for its time, enabling users to manage files and perform various tasks without deep technical knowledge.

In summary, the Radio Shack CT-502 represents a significant milestone in early computing history, offering a combination of portability, ease of use, and expansion capabilities. With its reliable hardware, user-friendly interface, and diverse connectivity options, it remains a fondly remembered piece of technology that paved the way for modern personal computers.