Is NUSO down?

Our staff has been made aware of an outbound calling issue on the Blue platform. Our Engineering team has been engaged and is investigating.

Outbound calling issues have been cleared and the system is back to functioning normally

We are continuing to monitor for any further issues.

This incident has been resolved.

We are currently experiencing intermittent inbound call failures affecting portions of the Northeast region. Our teams have identified the underlying issue as a fiber cut within the Verizon network. NUSO has rerouted traffic around the affected network path, and calls should now be completing normally without interruption. We will continue to monitor call completion and network performance while Verizon investigates and repairs the underlying fiber issue. Additional updates will be provided as they become available.

A fix has been implemented and we are monitoring the results.

NUSO has rerouted all traffic that can be moved away from the affected Verizon network path. Following these routing changes, inbound calling is operating normally across the areas where alternate routing is available, and related trouble reports have significantly subsided. A limited number of smaller geographic areas remain affected where alternate routing capabilities are not currently available. Verizon has identified the underlying issue as a fiber cut and has advised that intrusive testing of the affected fiber will begin at approximately 8:00 PM ET this evening. At this time, we are marking the broader service impact as cleared and will continue monitoring network performance. NUSO Engineering will remain engaged with Verizon as they perform testing and work toward full restoration of the affected fiber facilities. We will provide additional updates if conditions change or once Verizon completes its repair activities.

During the maintenance window, offnet field technicians cleaned, scoped the fibers and OTDR tested the common fibers on DWDM, confirming that the OSP plant fiber paths are in good condition. Despite further troubleshooting with Transport the DWDM issue remains unresolved. Tier 2 has been engaged to evaluate the situation and develop a detailed action plan. The work around from the NUSO side still remains in place while Verizon further investigates

Verizon’s Director has confirmed that a technician has been dispatched to the same location investigated yesterday and is currently on site. At this time, Verizon has not confirmed whether the affected equipment cards have been replaced. The field technician has, however, identified a light-level issue originating from the far end of the fiber span. To further isolate the fault, Verizon is dispatching an additional technician to the far-end location, with an estimated arrival time of approximately one hour. SERT will continue working with Verizon to confirm whether the equipment cards were replaced and to determine whether the light-level issue was identified following that replacement effort or whether the card replacement had no impact on service restoration. The next update is expected at 2100 GMT.

A card replacement has been completed within the Verizon network.

We have had reports of intermittent call quality issue on the Blue Network. We have escalated this matter to our Engineering Department and they are actively working on it.

Some adjustments were made and we are monitoring at this time

We are continuing to monitor for any further issues.

All calls are completing normally at this time.

Our team has identified an issue within the Blue Network that is intermittently impacting the ability to place outbound calls. Our Network Operations Center (NOC) has engaged NUSO Engineering, and teams are actively investigating the issue. We are currently awaiting additional findings and will provide an update as more information becomes available. We apologize for any disruption and appreciate your patience while we work to restore normal service.

Inbound and outbound calling on the Blue Network is currently operational. We are continuing to observe intermittent call quality issues. NUSO Engineering is actively investigating and working to resolve the remaining service degradation. We will provide additional updates as more information becomes available.

NUSO Engineering has resolved the issue impacting the Blue Network. Inbound and outbound calling, including call quality, has returned to normal operation. Our teams will continue to monitor the network to ensure service remains stable. A formal Root Cause Analysis (RCA) / Reason for Outage (RFO) will be provided once the investigation and review are complete.

We are aware of reports of intermittent call and fax issues on the Blue platform and are actively investigating. We will provide updates as more information becomes available.

We have identified the underlying issue affecting the Blue platform and applied a fix at 1:13 PM Central Time. We will continue to monitor performance to ensure service remains stable.

We are continuing to monitor for any further issues.

This incident has been resolved.