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FreeDMR/docs/freedmr-2/05-data-packet-policy.md

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Data Packet Policy

No regression of DMR data support is permitted.

FreeDMR should forward supported DMR data packets according to conference/subscription and mesh rules. The FreeDMR core should not become a general GPS/SMS application processor.

GPS, SMS, and similar application processing should be implemented by systems connected via FBP or another mesh/access-adjacent interface. DATA-GATEWAY is understood as an earlier expression of this model.

Existing SUB_MAP / last-known-location behaviour is intentional: data addressed to a DMR ID can be routed toward the last known HBP/client location.

Narrow exceptions may exist for SMS-based dial-a-TG control or DMR SMS alerts to the sysop.

Data/control classification must be separate from group-vs-unit addressing. A group-addressed data packet is not automatically a voice stream.

The packet layer may inspect data packets for admission, routing, loop/source-quench safety, reporting, and metadata preservation. Application-level GPS/SMS semantics should live outside the core unless a specific control-plane feature requires it.

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