Hold to talk
Use a large, glove-friendly transmit control with clear grant, busy, and end-of-burst feedback.
Private push-to-talk for field teams
SP-RADIO · SELF-HOSTED
Press once.
Reach the whole private channel.
PTT Secure Radio turns an eligible private Global Chat group into a low-latency, half-duplex operations channel. Hold to transmit, release to listen, and keep every live burst end-to-end encrypted while a keyless relay forwards only ciphertext.
End-to-end encrypted audioPrivate group channelsPolicy-controlled rollout
9:415G · 86%
PRIVATE GROUP
LISTENINGField Operations
CHANNEL CLEARReady for trafficHalf-duplex · encrypted
01E2Efresh encryption for every burst
02≤50members in a focused v1 channel
0360 secdefault transmission ceiling
040 keysavailable to the relay
Radio interaction
The speed of a radio without trusting the radio server.
Secure Radio combines a familiar hold-to-talk experience with the encrypted identities, private groups, device enrollment, and policy controls already present in the SecurePhone stack.
Live private channels
Enable Radio on eligible members-only, non-anonymous Global Chat groups instead of creating public channel directories.
Per-burst encryption
Fresh burst keys protect the audio while sender-authenticated frames reject relay or member impersonation.
Keyless relay
A dedicated WebSocket relay forwards opaque frames without a room identity, audio plaintext, or decryption key.
Channel state
See the active talker, listening state, busy feedback, and bounded transmission time on one dedicated surface.
Fleet policy
Keep Radio opt-in by deployment and control relay routing, availability, and transmission duration through managed policy.
Channel workflow
Turn a managed private group into a live radio net.
The radio surface extends the existing Global Chat group model, so every participant starts with a managed identity and an approved private-room boundary.
Enable the fleet capability
Expose the Radio mini-app and assign the approved relay route in the deployment policy.
Approve the group
A group administrator enables Secure Radio for an eligible private, members-only room.
Arm and listen
Members select the channel and confirm that it is ready before operational traffic begins.
Press, speak, release
The phone encrypts and signs the burst, then the relay distributes ciphertext to current listeners in real time.
Pilot deployment boundary
Built for controlled teams—not public safety dispatch.
Secure Radio is an opt-in software capability for supported Android deployments. Pilot acceptance should validate real devices, real networks, codec support, live latency, relay placement, and ordinary messaging before production rollout.
Explore Global ChatPrivate rooms only
The v1 security boundary requires members-only, non-anonymous Global Chat groups.
Focused channel scale
The v1 design targets up to 50 members per channel and short half-duplex bursts.
Supported Android devices
Availability depends on audio codec support, app release, managed policy, and foreground/background operating mode.
Pilot before operational reliance
Secure Radio complements encrypted chat and calls; it does not replace emergency communications or regulated radio systems.
Secure Radio pilot
Give field teams one private channel they can key up instantly.
Scope compatible hardware, private groups, relay placement, fleet policy, and acceptance checks for your operating environment.
Configure yours