According to one embodiment of the invention, a method for controlling flow of data cells within a digital subscriber line access multiplexer is provided. The method includes providing a flow control package for a cell delineation module of the digital subscriber line access multiplexer. The method also includes receiving, at the flow control package, at least one signal indicating that one or more buffers within the digital subscriber line access multiplexer have reached a predetermined data storage capacity. The method also includes directing, from the flow control package, at least one device that is operable to transmit the data to the one or more buffers to halt transmission of the data to the one or more buffers in response to receiving the signal.