What makes solid performing hardware? You’d be correct in guessing that it might start with solid hardware. When Arista mentioned in their whitepaper* that the 7150S included an onboard high precision “Oven-Controlled Crystal Oscillator” (OXCO), I was compelled to find out what this gadget accomplishes on the DCS-7150S.
An Oven-Controlled Crystal Oscillator OXCO is an oscillator circuit housed inside a temperature controlled oven, keeping the both the crystal and the oscillator at a constant and precise temperature. One example of its use: This little OXCO with Arista’s hardware-based time stamping helps organizations like NPL, the UK’s National Measurement Institute, maintain the UK’s time scale. This in turn contributes to the international time scale, which sets the standard for Coordinated Universal Time (UTC).
Arista claims the OXCO provides better frequency stability, is more impervious to voltage and temperature variations, and helps the onboard clock keep ticking accurately while no master clock is available upstream.
Do you employ timestamping in your network and happen to be looking for DCS-7150S-64-CL-F, DCS-7150S-64-CL-R, DCS-7150S-52-CL-F, or DCS-7150S-52-CL-R? Please contact me directly for a price quote.
Other sources: https://www.arista.com/assets/data/pdf/7150S_Q&A.pdf