534  6   

|  |          |    ( 4056 )      | CRC |  |

/8   7   6   5   4   3   2^<1

DLCI            I C/R | EAO
DLCI       |FECN|BECN DE EA1

. 6.26.   LAP-F

     HDLC,      
,     .

    (Data Link Connection Identifier, DLCI)
  10 ,     1024  .
 DLCI          
EAO  EA1 (Extended Address   ).     
  ,    EAO  ,    
   ,      1,   
EA1     .

  DLCI  ,    
    DLCI   16 ,    
  23 .

 frame relay (ANSI, ITU-T)   DLCI  -
    :

 0        (LMI);

 1-15     ;

 16-991      PVC  SVC;

 992-1007       
;

 1008-1022     ;

 1023      .

 ,    frame relay    -
  976  DLCI.

      4056 .

 C/R      HDLC    
-.

 DE, FECN  BECN     -
       .

      frame relay      (QoS)
 .         
      .

  

 frame relay     
    ,   -
  .