Broadband Maintenance & Disruptions

Concord Broadband performs routine maintenance on the equipment that provides internet connectivity to customers, from the Optical Network Terminals (ONTs) in customers' homes and in businesses, to the servers and network switches/routers that provide the backbone for all communications. This service ensures the highest level of security and reliability of our network.

Much of the maintenance performed does not impact customers, but we always notify people of any work that could impact our customer's experience. Unless it is deemed an emergency and when possible, maintenance is scheduled for 1-6am on Saturday/Sunday mornings.

Public Notice: Planned Broadband Maintenance

[Update: Subsequent maintenance windows will take place in the March/April time frame.]

The Concord Municipal Broadband team will be conducting a series of scheduled maintenance activities in support of our transition to XGS‑PON, the next generation of fiber‑optic broadband technology. This upgrade will significantly expand network capacity, enable symmetric multi‑gigabit service tiers, and ensure long‑term reliability for all subscribers. 

During the maintenance windows listed below, most customers will experience a brief service interruption lasting approximately 15–30 minutes. While a full service outage remains possible, it is not anticipated. If required to ensure the integrity of the upgrade, we reserve the right to take portions or all of the network offline for the full duration of the maintenance window. If everything goes as expected, each customer's service would only be impacted during the maintenance window when your service is moved from the old to new equipment.

No action is required from you, and services should resume automatically once maintenance is complete. If you still experience problems after 6am on a given day, please reboot your modem/router and contact our support team at 978-318-3199.

For more details on this XGS-PON project, please see the 2025-12-10 Broadband Update at https://concordma.gov/3148/Monthly-Updates.

In addition to this general notice, targeted notifications will be issued to customers expected to be directly affected on each specific night.

Scheduled Maintenance Windows:

  • February 18, 2026 - 12:00 a.m. to 6:00 a.m.
  • Subsequent maintenance windows in March/April 2026

We appreciate your cooperation as we undertake this essential infrastructure enhancement.

Service Disruptions

None at this time.


Service Impacting Maintenance Window

Please see above regarding the migration to XGS-PON.