FTTP network diagnostics require a completely new baseline.
Legacy copper environments ran at 10-15ms pings to London data centres. Copper impedance and VDSL2 interleaving caused that delay.
Full fibre changes the math.
FTTP Architecture
A GPON architecture has zero active switching between your Optical Network Terminal (ONT) and the exchange. It uses passive light-splitting. The Openreach technical specifications confirm this drops physical latency to the absolute floor.
The New Baseline
Bypass the router. Plug ethernet directly into the ONT.
- ICMP to 1.1.1.1 (London): 2ms - 4ms
- Jitter: < 0.5ms
- Packet Loss: 0%
If an FTTP connection operates above 8ms locally, the passive optical network is fine. The fault lies in your ISP routing table. Or internal LAN congestion. I broke down how to fix LAN congestion in my guide on Diagnosing Bufferbloat.
Map these baselines strictly. You will instantly know if the fault is external or internal.
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