---
title: Welcome to the COS Advent Calendar 2025
description: Join the COS Advent Calendar 2025 for daily insights, tips, and surprises from December 1 through Christmas Eve. Stay tuned for a festive mix of content.
image: https://insights.cossystems.com/hubfs/Featured%20Advent%20Calendar.jpg
---

![](https://insights.cossystems.com/hubfs/Featured%20Advent%20Calendar.jpg)

 

# COS Advent Calendar 2025 🎁

The countdown is on! Each day from December 1 through Christmas Morning, we’ll open a new “door” here on the blog—short reads, practical tips, and a few surprises from the COS team and our community. Expect a festive mix of fiber know-how, customer stories, tiny how-tos, and a peek behind the scenes of the tools that help operators deliver great broadband.

Whether you’re building an open access network, running day-to-day operations, or just curious about what’s next, this calendar is for you. Come as you are, grab a mug of something warm, and check back daily for a new post—bite-sized enough to read between meetings, useful enough to share with your team.

Bookmark this page and join us here on December 1. Until then, consider this your welcome mat. We’re glad you’re with us and hope you'll enjoy it 🌟

[ Reach out and learn more! ](https://www.cossystems.com/contact-us/)

 

## Related Articles

[![](https://insights.cossystems.com/hubfs/Advent%20Calendar%20496x300%2025.png) ](https://insights.cossystems.com/cos-advent-calendar/25-thank-you-for-being-part-of-this-years-cos-advent-calendar)

### [#25 Thank You for Being Part of this Year's COS Advent Calendar](https://insights.cossystems.com/cos-advent-calendar/25-thank-you-for-being-part-of-this-years-cos-advent-calendar)

As our Advent Calendar comes to an end, we want to take a moment to say thank you.Throughout December, we’ve shared insights, ideas, and stories from across COS Systems,...

![Maren Buchmüller](https://insights.cossystems.com/hs-fs/hubfs/1687264710275.jpeg?width=45&name=1687264710275.jpeg) 

[Maren Buchmüller](https://insights.cossystems.com/cos-advent-calendar/author/maren-buchmüller) 

[Read More](https://insights.cossystems.com/cos-advent-calendar/25-thank-you-for-being-part-of-this-years-cos-advent-calendar)

[![](https://insights.cossystems.com/hubfs/Advent%20Calendar%20496x300%2019.png) ](https://insights.cossystems.com/cos-advent-calendar/19-see-you-at-metro-connect-2026)

[Metro Connect 2026!](https://insights.cossystems.com/cos-advent-calendar/tag/metro-connect-2026)

### [#19 See You at Metro Connect 2026](https://insights.cossystems.com/cos-advent-calendar/19-see-you-at-metro-connect-2026)

We're heading back to Metro Connect,  and I couldn’t be more excited!Last year’s conversations in Fort Lauderdale were electric. This February, we're coming in with our...

![Maren Buchmüller](https://insights.cossystems.com/hs-fs/hubfs/1687264710275.jpeg?width=45&name=1687264710275.jpeg) 

[Maren Buchmüller](https://insights.cossystems.com/cos-advent-calendar/author/maren-buchmüller) 

[Read More](https://insights.cossystems.com/cos-advent-calendar/19-see-you-at-metro-connect-2026)

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