Abstract: A serial redundant bypass control mechanism for maintaining network bandwidth management service includes a first and second bypass control module, a first and second bandwidth management control module, and a first bypass connector line connecting the first bypass control module to the second bypass control module. Under normal conditions, a network signal is received at the first bypass control module and transported to the first bandwidth management control module. The first bandwidth management control module performs bandwidth management services on the network signal and transports the network signal back to the first bypass control module. The first bypass control module then transports the network signal to the second bypass control module along the first bypass connector line. Next, the second bypass control module transports the network signal to the second bandwidth management control module.