COS Advent Calendar 2025 🎁

The countdown is on! Each day from December 1 through Christmas Eve, 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. 🌟