said by chamb267 :Sounds like one of your 2 pairs has crashed. Pair bonded means you have 2 DSL lines bonded together. Check all your cords from the modem to the wall jacks.
Each of the 2 DSL lines carries about half of the data. That is exactly what you now have.
You were right, when I rebooted the modem I lost all access. One pair up, one pair down, no service, waiting on a tech