GPRS
From charlesreid1
What Is It
GPRS = General Packet Radio Service
GPRS is a communications network that allows TX/RX of IP packets to external networks (i.e., the internet).
GPRS supports the IP protocol (in practice, IPv4, and not IPv6).
GPRS supports PPP (point to point protocol). If mobile phone is used as modem to connected computer, PPP is used to tunnel IP to the phone. Allows dynamic IP (IPCP, not DHCP) assigned to mobile equipment.
GPRS supports X.25 connections. This is used for wireless payment terminals, but removed from standard. Can still be supported over PPP, or over IP, but requires network-based router for encapsulation, or intelligence built into terminal.
GPRS supports TCP/IP - each phone can have one or more ip addresses allocated, GPRS stores and forwards IP packets. TCP handles packet loss/radio noise.
More info: https://en.wikipedia.org/wiki/General_Packet_Radio_Service
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digital modes digital modes for radio communications.
Notes:
Digital Modes: SSTV · PSK · MFSK · Olivia · RTTY GSM (cellphone radios) · GMSK · GPRS · Echolink Packet · APRS · TNC · TCPIP Over Packet WSPR ·
Hardware: TNC modem for Raspberry Pi: RaspberryPi/TNC-Pi Tinytrak replaces TNC modem for APRS devices: Tinytrak
Software: Linux: Qsstv · Fldigi · Flmsg · Xastir Linux software master list: Andys Ham Radio Linux
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SDR software defined radio
SDR Software: SDR through the web browser: WebSDR The "true" software defined radio: Gnuradio WAV file to Waterfall: Gnuradio/Wav to Waterfall Gqrx spectrum analyzer: Gqrx
Android + HackRF/SDR: Android/SDR Kali Linux + Gqrx + HackRF: Kali/HackRF Kali Linux + Gqrx + RTL-SDR Dongle: Kali/SDR Dongle
SDR Hardware: HackRF: HackRF · Kali/HackRF RTL-SDR Dongle: Kali/SDR Dongle FlightAware: FlightAware
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radio all things radio.
Ham Radio: Notes on General class license: General Digital modes: Radio/Digital Modes
Ham Radio Hardware (Radios): Kenwood TS 440S: Radio/Kenwood/TS440S Kenwood TS 570S: Radio/Kenwood/TS570S Yaesu VX-6: Radio/Yaesu/VX-6 Digital Modes on Raspberry Pi: RaspberryPi/Digital Modes Digital Modes on Arduino: Arduino/Digital Modes DVB-T USB SDR Dongle: DVB-T USB SDR
Ham Radio Software: Software defined radio: SDR Comprehensive list of ham software: Andys Ham Radio Linux Direwolf (soundcard TNC/APRS modem): Direwolf Echolink (internet repeater system): Echolink Qsstv (Slow scan television): Qsstv Fldigi (fast light digital modes): Fldigi Xastir (APRS/AX25/TNC): Xastir RadioHead (packet library for microcontrollers): RadioHead
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