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Packet Station
Welcome to the packet page. This page is designed with the packeteer in mind, novice and professional. Check this page regularly for updates to new packet links and packet stations, where they are in the 146.91 coverage area. WHAT IS PACKET RADIO Packet radio is the communication of digital data via radio. The TNC or Terminal Node Controller hears an audio signal from the radio and converts the data to a digital form that is normally sent to a computer. Like wise the TNC converts data from the computer into information packets or frame. The packet signal a group of characters with a flag and header at the beginning and a checksum and flag at the end. A flag is a specific character used to indicate the beginning and ending of a packet. The header tells who the packet is from and who it is to, and any relay stations and control information. A checksum is a complicated mathematical formula that is generated and is unique to the combination of characters that are in the packet. This unique number is calculated by every station that handles the packet, and if the number does not match the packet is thrown away and a request to send the packet over is sent, thus error-free communications. The rules the TNC uses to form the packets is called a protocol, and the protocol most used by the amateur community is AX.25 Level 2.
LINKS TO OTHER PACKET RELATED TOPICS
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