Patent ID: 8630546

Claim:
A method comprising: monitoring, with a network interface device, one or more instances when the network interface device transmits information to an optical line terminal (OLT) within a current frame; determining, with the network interface device, a time when a next frame should be received by the network interface device based on the monitored one or more instances when the network interface device transmits information to the OLT; receiving time of day (TOD) information associated with a frame; modifying the TOD information to account for delays in the network interface device for receiving the TOD information; determining a time when the frame associated with the TOD information should be received by the network interface device based at least on the determined time when the next frame should be received by the network interface device; and loading the modified TOD information, within a TOD clock on the network interface device, based on the time when the frame associated with the TOD information should be received by the network interface device to synchronize the TOD clock on the network interface device with a TOD clock on the OLT.