A hobbyist achieved remarkable 26-nanosecond time synchronization accuracy using a $20 surplus telecom SFP module, dramatically outperforming their previous Raspberry Pi NTP setup that managed only ±200 nanoseconds. The Oscilloquartz OSA-5401 module, originally designed for cellular network timing, provides hardware-level PTP timestamping with built-in GPS and oven-controlled oscillator. This demonstrates how enterprise-grade timing hardware can be repurposed for extreme precision timekeeping at minimal cost.
Background
Precision Time Protocol (PTP) is a protocol used to synchronize clocks throughout a computer network, providing much higher accuracy than Network Time Protocol (NTP). Telecom equipment often requires nanosecond-level timing for cellular network synchronization.
- Source
- Lobsters
- Published
- Apr 27, 2026 at 04:55 PM
- Score
- 7.0 / 10