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SIP-DMR Portal

Connect SIP/VoIP handsets on your PBX to DMR talkgroups on a SystemX or MMDVM network. Users dial a feature code, enter a talkgroup, and the portal provisions a per-call bridge.

Repositories

Repository Role
sip-dmr-exchange SIP B2BUA, Docker orchestration, HTTP /bridges and /stats API
sip-dmr-bridge Per-call MMDVM bridge container
sip-usrp-bridge USRP/MMDVM components baked into the bridge image
sip-dmr-exchange-dashboard Optional static ops dashboard

Legacy repos

dmr-portal and dmr-portal-dashboard are superseded by the stack above.

Typical flow

  1. User dials your feature code (e.g. 234) on the PBX
  2. IVR collects a talkgroup number
  3. PBX sends INVITE to sip-dmr-exchange with custom SIP headers
  4. Exchange spawns a sip-dmr-bridge Docker container
  5. Audio is bridged SIP ↔ MMDVM ↔ your DMR network

See Architecture for a detailed diagram.

Who is this for?

  • Self-hosters — run exchange + bridge on a Linux VM with Docker (Self-Hosting)
  • PBX admins — FreePBX/Asterisk trunk, IVR, and access control (FreePBX integration)
  • FreeSTAR Everywhere — production deployment uses this stack with Misc Application allowlists and the phonebook DMR tab

Licence and access

Source repositories are currently private within the FreeSTAR-Network organisation. Documentation here is written for a future public or friends-and-family release. Never commit SIP_AUTH_TOKEN, .env secrets, or production credentials to git.

Last update: August 17, 2026 21:08:54
Last updated by: MØVUB
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