Lane layer of OpenFibre for one lane (ECSS-E-ST-50-11C clause 5.5): lane initialisation and standby state machine
(LN-1), transmitter (LN-2), receiver with word synchronisation and RXERR word counter (LN-3) and parallel loopback
(LN-4). It connects the Multi-Lane layer (words of 32 bits with 4 K flags) to a Physical adapter (decoded symbols).