Newer firmware versions often include an "auto-sync" feature, which detects the PON signal type (GPON or EPON) without manual configuration.
The GM220-S is a robust piece of networking technology, but its performance relies heavily on the software running it. Keeping the firmware up to date ensures you get the speeds you pay for, maintains network security, and ensures compatibility with your ISP’s evolving infrastructure. Firmware Gm220-s
The latest updates, such as those released in April 2026 , focus on improving compatibility and automation: maintains network security