Unwrap the 2025 COS Advent Calendar: Practical goodies for fiber teams, every day 🎁

It is the holiday season — and this year’s COS Advent Calendar is packed with hands-on treats your team can actually use. Every day until Christmas, we’ll drop a bite-size resource you can put to work right away: fun videos, real-world case studies, seasonal playbooks, whitepapers, and more. Kick off with a hello from Isak & Maren, then dive in!