Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Understand that NFPA 72 has not recognized two POTS lines as a compliant dual path since the 2013 edition — a true dual path requires two different transmission technologies (e.g., cellular plus IP).
Reference the locally adopted NFPA 72 edition's supervising station communications requirements for path supervision intervals and trouble-signal behavior, confirming current section numbers against that specific edition.
Track your carrier's copper/POTS retirement filings and timelines in your service territory, since large carriers have been decommissioning copper facilities in stages rather than on one national date.
Select replacement communicators offering IP-primary with cellular failover (or another dual-technology combination) rather than a single-technology solution for code-required dual-path applications.
Re-commission and test the new communicator's supervisory signaling with the receiving central station after cutover, and update the Record of Completion.
Known gotchas
Confirm the AHJ's adopted NFPA 72 edition — dual-path and latency/jitter requirements have phased in across recent editions, so exact obligations depend on the locally enforced edition.
Carrier POTS retirement is being executed market-by-market — don't rely on a single 'national' sunset date; check the specific carrier's regulatory filings for your service area.
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