, , , . , .
, , . : () 16-20000 , . , , . . , , . .
, . . MNP 30% , .
MNP2.
MNP2 - BSC (Binary Synchronous Communications). , - . : - . - - 8 , , ; , ; . , . , 10 , .
. -, - - . , , MNP2. . -, , .
MNP2 :
:
MNP2 :
, : SYN, DLE STX (16h, 10h, 2h - );
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- (PDU);
- , 2 : DLE ETX (10h, 3h);
, X**16 + X**15 + X**2+ 1.
, . DLE, .
, , . DLE BSC . MNP2 - -, . - .
MNP2 6 : LR, LD, LT, LA, LN LNA. , , .
MNP3
MNP3 - . V.42, - , , . - , - MNP2. MNP3 - MNP2 V.42.
, , MNP3 V.42, MNP2. , - MNP. , MNP3 LR - . - , . , , MNP2 - , , - MNP3
MNP (MNP3 ) :
FLAG , <01111110> (7Eh). . .
MNP ( )
MNP , , .
, () " " (LR). , LR . PDU " " (LA), . . " " (LT). , " " (LA). , . , , PDU LA, " " (LR). .
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, MNP " " LT. " " (LA) , LT, , . LT. , , LT , .
, " " (LD). LT , . MNP DTE BREAK, , " " " " (LN LNA). " " LN , , BREAK, . " " (LNA), SSN LN.
, . , "" :
- ;
- , ;
- () MNP .
LR LA. LR. MNP2, MNP-.
LR , . LR, , .
LR , LA, , . , . , , "" .