To clear up a vital regulatory detail right from the start, the official AllStarLink network is strictly reserved for licensed Amateur Radio (Ham) operators and does not permit GMRS operations on its core network. However, independent, GMRS-specific networks modeled after the same underlying software (Asterisk/app_rpt) allow you to run a private simplex node for friends and family without needing an amateur license. [1, 2, 3, 4]

While you do not need an additional platform-specific license to run an independent GMRS node, you and anyone transmitting over the air must still possess a valid FCC GMRS License ($35, no test required, covers immediate family). [1, 2]

GMRS Simplex Nodes (Parrot Devices) Explained

Independent GMRS networks let hobbyists build personal nodes using voice-over-IP (VoIP) to bridge radio frequencies with the internet. [1, 2]

  • Simplex Node: A low-power transceiver wired to an internet-connected computer (like a Raspberry Pi). It transmits and receives on a single frequency. [1, 2, 3]
  • Parrot Mode: A specific software feature within the node configuration (parrot = 1). It records your incoming transmission and “parrots” it back over the air. This is primarily used as a simplex repeater or an audio quality check tool. [1, 2]
  • Dedicated GMRS Networks: To connect with others legally, you must register your hardware with specialized GMRS logging servers like GMRS Live or GMRS.network rather than the Ham-only AllStarLink. [1]

Important Frequency and Tone Guidelines

As mentioned, being a courteous operator means verifying your local RF footprint so you don’t inadvertently disrupt existing infrastructure: [1]

  • Scan First: Before programming your simplex node, monitor the frequency locally to ensure you are not stepping on an active local duplex GMRS repeater. [1]
  • Frequency Coordination: Utilize shared resources or local GMRS groups to find clear channels.
  • PL / CTCSS Tones: Always configure unique PL tones (Continuous Tone-Coded Squelch System) on your node transceiver so it only opens squelch for your intended traffic, reducing interference from distant stations. [1]
  • Equipment Compliance: Ensure the radio transmitter physically connected to your node is FCC Part 95 approved for GMRS use. [1, 2]

If you are setting this up, let me know:

  • What hardware interface (e.g., Raspberry Pi, URI, pre-built hotspot) you plan to use?
  • Whether you need help finding Part 95 compliant radios for the RF link?

I can guide you through the configuration steps for a true GMRS-legal network.