TANAR_FULL_DUP
fullduplex = (tanar & TANAR_FULL_DUP);
| TANAR_HALF_DUP | TANAR_FULL_DUP,
if ( (fullduplex = (tanlpar & TANAR_FULL_DUP) &&
(tanar & TANAR_FULL_DUP)) ) {
((tanlpar & TANAR_FULL_DUP) &&
(tanar & TANAR_FULL_DUP))) {