Radio Shack CT-502 owner manual Safety Information, Traffic Safety, Operating Environment

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SAFETY INFORMATION

TRAFFIC SAFETY

•Do not use a handheld phone while driving a vehicle. If using a handheld phone, park the vehicle before taking or making a call.

•Always secure the phone in its holder; do not place the phone on the passenger seat or where it can break loose in a collision or sudden stop.

•Never install a phone alert device that operates your vehicle’s lights or horn. This is illegal in most areas.

Remember, always put road safety first!

OPERATING ENVIRONMENT

•Remember to follow all special regulations and always turn off your phone whenever you are required to do so, or when it might cause interference or be dangerous.

•Any radio transmitting equipment, including cellular phones, might interfere with inadequately protected medical devices. Consult a physician or the manufac- turer of the medical device if you have any questions. Other electronic equipment might also be subject to interference.

•As with other mobile radio transmitting equipment, for your safety, only use your phone in the normal operating position (held to your ear with the antenna pointing over your shoulder).

•Turn off the phone while getting gasoline (at a filling sta- tion). Observe restrictions on the use of radio equipment in fuel depots (fuel storage and distribution areas), chemical plants, or around blasting operations.

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Contents CT-502 Flip-Style Handheld Cellular Telephone Features Fm Page 3 Wednesday, July 21, 1999 223 PM Table of Contents Care and Maintenance Specifications Other FeaturesResetting the Phone Troubleshooting Safety InformationLook AT Your Phone Earpiece Status IndicatorsRetractable Antenna Flip Cover Volume Controls Reading the Status IndicatorsPower/Lock Indicator InUse IndicatorRoam Indicator NoSvc No Service IndicatorReading the Display Installing the Battery Using the BatteryCharging the Battery Checking Battery Power Replacing a Battery During a Call Important Battery Tips Basic Operation Signal STRENGTH/SERVICE AreaTurning the Phone ON/OFF Making a Call System Busy Message Answering a CallTone Display Shows Description Missed Call Message Using Mute Adjusting the VolumeAdjusting the Earpiece Volume Adjusting the Ringer VolumeImportant Notes Making Emergency CallsUsing Automatic Redial Using Last Ten Number RedialRedialing Numbers Your Phone Number Displaying NumbersNumber Longer than Seven Digits Overview Menu FunctionsTurning a Function On/Off Function Status Quick-Review Menu Functions List Number Pref Auto LockTurbo Dial Emergcy CallTurning the Signal Strength Meter Off/On Using the Menu FunctionsTurning the Call-Time Reminder Tone Off/On Using Silent Scratchpad Turning the Automatic Call Timer On/OffChanging the Ringer Style Changing the Alert Type Turning the Keypad Tones Off/On Using Automatic Answer Turning One-Touch Dialing Off/On Using Multiple Key AnswerTurning the Number Display Preference Off/On Turning the Emergency Display Off/OnUsing Call Screening Turning the Message Reminder Tones Off/On Storing Speed Dial Numbers Using MemoryFm Page 37 Wednesday, July 21, 1999 223 PM Block Number Includes Memory Locations Storing Speed Dial Numbers in BlocksSpeed RECALL/DIALING ONE-TOUCH DialingScrolling by Name Alphabetical Order Memory SCROLLING/DIALINGScrolling While a Call is in Progress Scrolling by Memory Location NumberChanging Information in a Memory Location Clearing a Memory Frequently Dialed Area Codes/Prefixes Using Scratchpad MemoryBanking or Other Phone Services Memory Dialing TipsUsing Manual Lock Security FeaturesLocking Your Phone Changing the Lock Code Using Automatic LockDisplaying the Lock Code Service Description Level Using Service RestrictionsFm Page 49 Wednesday, July 21, 1999 223 PM You See Meaning Other FeaturesUsing the Messaging Functions Overview/Receiving MessagesViewing/Recalling Messages Deleting Messages Using the Phone with Handsfree EquipmentDisplaying the Individual Call Timer Using the Call TimersDisplaying the Cumulative Call Timer Using the Resettable Call TimerPhone Cellular System Type Display Shows Number Selecting the Active Phone NumberSetting the Cellular System Type Std AB Selecting the Cellular System Type Displaying the Currently Selected System TypeRoaming Using Cellular System PIN DialingEnabling/Disabling PIN Dialing Making a Call Using Your PINAdding a Pause Using TOUCH-TONE ServicesStoring a Calling Card Sequence Calling Card DialingPlacing a Call Using a Stored Calling Card Sequence Using Master Reset Resetting the PhoneUsing Master Clear If the phone’s power does not come on or stay on TroubleshootingIf the power comes on, but the phone does not work Traffic Safety Safety InformationOperating Environment Emergency Calls FCC Regulations Care and Maintenance Patent Information SpecificationsFm Page 72 Wednesday, July 21, 1999 223 PM Display Message Glossary Full Indiv TimerNoNames Stored Emergcy CallScan B Std SettingScan a Scan ABDivision of Tandy Corporation RadioShack

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.
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