Briefing 04 // SUBSYSTEM: Telecoms & VoIP // 24 PAGES A4 PDF
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The 2027 PSTN Switch-Off: Protecting Commercial VoIP, Alarms & Lift Lines
Why FTTP fibre migration introduces a Second-0 power dependency—and how to build a 4-tier PACE telecoms stack.
Mandatory Plant-Room Commissioning Checklist
- Audit all FTTP ONTs, VoIP PBXs, fire/intruder alarm redcare lines, and lift emergency telephones
- Fit 12V DC inline Mini-UPS units to all fibre ONTs and primary routers for instant 8-hour bridge protection
- Configure Dual-SIM multi-network 4G/5G and 12V/48V DC Starlink failover on core firewalls
- Stage pre-programmed DMR/PMR446 handsets for immediate floor-warden coordination
Full Standard Operating Procedure (SOP) Protocol
# RESILIENCE LAB TECHNICAL SOP 04
## The 2027 PSTN Switch-Off: Protecting Commercial VoIP, Alarms & Lift Lines