# Practical Considerations when Building a Commercial Time as a Service Network

- Institution: CERN
- Speaker: Reindert Hommes
- Year: 2026
- Language: English
- Source: [CERN](https://videos.cern.ch/record/3025753)
- Licence: [CERN](https://copyright.web.cern)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

This presentation focuses on the practical implications of deploying a White Rabbit-based commercial Time as a Service network. We address topics including DWDM filter design, firewalls, bookkeeping, and silent errors — the operational details that determine reliability. Our service is scoped strictly to T&F transport, with 1PPS and 10MHz as the customer demarcation point. This clean boundary creates an inherently cyber-safe architecture. The T&F network is built in parallel with a 400G data network, with a 1625nm OTDR continuously monitoring fiber health. Rather than relying on the α coefficient, we apply a mathematical model for propagation delays, with every component serialised and its measured delay recorded in a central database — ensuring operational excellence when deploying or replacing hardware.

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## Lectures

1. [Practical Considerations when Building a Commercial Time as a Service Network](https://invisiblenetwork.ai/learn/cern/3025753/a50fc228adda), 22 min (CERN's player)