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  2. AX.25 - Wikipedia

    en.wikipedia.org/wiki/AX.25

    AX.25 (Amateur X.25) is a data link layer protocol originally derived from layer 2 of the X.25 protocol suite and designed for use by amateur radio operators. [1] It is used extensively on amateur packet radio networks.

  3. Wide-coverage Internet Repeater Enhancement System

    en.wikipedia.org/wiki/Wide-Coverage_Internet...

    WIRES II - Yaesu did terminate WIRES-II service on Saturday, September 30, 2017 at 06:00 UTC. They suggested in the future, to use the WIRES-X Internet linking system. [2] [3] WIRES-X - Supports the C4FM digital and the voice technology. It enables high sound quality by repeating C4FM digital data as it is via the Internet.

  4. Two-way radio - Wikipedia

    en.wikipedia.org/wiki/Two-way_radio

    Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...

  5. Packet radio - Wikipedia

    en.wikipedia.org/wiki/Packet_radio

    Upon adding a turn the transmitter on output signal ("PTT") for transmitter control, one has made a radio modem. Due to this simplicity, and just having suitable microchips at hand, the Bell 202 modulation became standard way to send the packet radio data over the radio as two distinct tones. The tones are 1,200 Hz for Mark and 2,200 Hz for ...

  6. Radio over IP - Wikipedia

    en.wikipedia.org/wiki/Radio_over_IP

    With RoIP, at least one node of a network is a radio (or a radio with an IP interface device) connected via IP to other nodes in the radio network. The other nodes can be two-way radios, but could also be dispatch consoles either traditional (hardware) or modern (software on a PC), POTS telephones, softphone applications running on a computer ...

  7. AN/PRC-148 - Wikipedia

    en.wikipedia.org/wiki/AN/PRC-148

    The AN/PRC-6809 MBITR Clear is a variant of the MBITR, made available without encryption. While the PRC-148 includes US Type 1 capabilities in all versions, the PRC-6809 uses Level III Data Encryption Standard, making it available to police, firefighters, and militaries unable to obtain International Traffic in Arms Regulations (ITAR) approval.

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