
Physical Layer 307
The Link layer shall keep track of a resettable counter that rolls over at every 1024 transmitted
characters (256 dwords). Prior to, or at the pre-roll-over point (all 1's), the Link layer shall trigger the
issuance of dual, consecutive ALIGN primitives, which shall be included in the dword count.
After communications have been established:
The first and second words out of the Link layer shall be the dual-ALIGN primitive sequence,
followed by, at most, 254 non-ALIGN dwords.
The cycle repeats, starting with another dual-consecutive ALIGN primitive sequence.
The Link may issue more than one dual ALIGN primitive sequence ...