A Cloudflare spokesperson told Ars that the cloud services provider saw “a spike in unusual traffic to one of Cloudflare’s services,” which “caused some traffic passing through Cloudflare’s network to experience errors.”
“We do not yet know the cause of the spike in unusual traffic,” the spokesperson said. “We are all hands on deck to make sure all traffic is served without errors. After that, we will turn our attention to investigating the cause of the unusual spike in traffic.”
No longer relevant pro tip - an extra pair was typically left at the incoming service, which was used for testing. It worked as a second line and didn’t interupt the main pair, allowing for a functionally free second phone line (that didnt have incoming service).
Perfect for modem use!