[an error occurred while processing this directive]
[an error occurred while processing this directive]


: 

        ,   , -  
    .             ,
   ,   .
           
    .    ,   
 .      :
"...                 1932 "
( "ComputerWorld", #25 1993.),    
    ,          ,   
 .        
     (...     
 ...),        .

     :

 :        
            (     )
 :         
            (     -     )

            (Hayes-
compatible)   ( CCITT V.22bis )  AnCom ST-2400,
               " -
".      ,      
(       ),  
           ,
 .

     ,      
     --------------------------------------------------------

             ,    .
        
      .      
        ,   , ,
         (  ).   
               .
     .

          -  
        .  
 ( ,      300...3400 ,     
""  )      ,  
   ,      
        ,       
  .          ,      
          , 
    ,        .   
         ().  
        ,      
  .

      -      ,  
     ,     
    .        ,  
       .

   (       ),   
      .
   -  (  -
         ).   . ,
                 , 
   ,       ( 2400 ) 
    ,    ( 1200 ).
    (  ).   600 
   +-20%         1800 .   
          
      .

       (   ,    
     ) -       
   .       2400 /   
      , ..   
    .

           
,       8...11 . 
          
  .

  -  (   
        1900 ).  
     .      
    6...8 .
  -  (    ).
          ,
       , "    ".
       (        
     ) -        ,
        (    
     ),     +-7 ,   . 
     ,    15 .
    (      ) -
               
        ().
    (     
   ) -      .

            .

   -            
             . 
      ,    .
    -      , 
        .    :
   -  ,     
    ,     ..
    -      
     .
     -          
   .            
        1...10   
    2 .
               
   (  ,  )     "  "    
         ,  
         .
               
       .           
        .

                    
                   ----------------------
             , 
   ,        
         (     
                
  ).            
( chip  set ).      ,     
        ,   ,
    .

          "      "
      .    1  
,         ,
  ,         
(       200$ )     ,     
    (" ").

 1

                      
                                          --
                                                               

                     ()  -13       -13...-10   -10       
    ()  -13...0    -15...0   
                                                    -15..-4            
   (   ) -43       -43...-35   -43       
    (  )  15        15          20       
   (  )  12        15          20       
              (  )                                 
                              V.22     +- 7.5   +-7..+-22.5   +-22.5   
                              V.22bis  +- 7.5   +-3...+-7.5   +-7.5    
     -                                  
  15          (  )                                 
                              V.22     .+-7..+-22.5   +-22.5   
                              V.22bis  .+-3...+-7.5   +-7.5    
         (  ) +- 4     +-4...+-10   
                                                                 
                                                                 +- 15    
          (  %)  4            4        4        
-  -                         
,   -                      :   
      (  )  V.22      6         4... 7      8...10   
                              V.22bis  .  4... 6      6... 8   
 /   ,                                   
     0.00001                                          
               (  )   V.22     9         8...15      7        
                            V.22bis    18        16...25      15       
                                                                          
  ,                                   
  0.25...20     (  )   .     1        
                                                                          
     -                                 
                                         
               (  )  V.22     .     0        
                              V.22bis  .     +2       
                                      
 +-6  (  )  V.22   .     1        
                              V.22bis  .     0.05     
      .              
  1                                                            
(   /  )                                 
                                 V.22  .     300/+6   
                                                                 300/-18  
                              V.22bis  .      5/+-3   



           
,      :
          
       -10 ;
        -60;
        15     180 .
        -
           .     
     :
   -     ,  , 
       ;
   -       
       (retrain)    ;
   -      , 
        .
          "retrain"   
         .

            , 
        .       
            
.        -      
       .     
  ,         ,  
    .

       2    ,     
    .         
 .

 2

                     
                                       - 
                                                           

  ()                                         
                            ()300...500290...850   
                                       290...665               
                            ()-35...-30   -25...-40   
                                                    
  "  "                              
                () 0.7...1.1   0.7...1.1   
                  () 2.9...5.0   2.9...5.0   
  ""                                               
                () 0.2...0.5   0.15...0.65 
                  () 0.2...0.5   0.15...0.65 
  " " ()                              
                         () 25...150    16...150    
                            ()16...50     16...50     
                (c) 0.7...1.1   0.7..1.1    
                  (c) 3.1...4.3   3.1...4.3   


               , , 
             ------------------------------
         ,        
,        .    ,    
            ""
     (      
     ).      
                 
(  )        .   
                    
   ,      .  -
  ,         .

        ,       
   (       ,   
,      ,     "  "
        ,       
),               ,  
    ,    .  
        .

   Ѷ.       .
               
 ()  ,           
  ,   ,    ... :
   -        ;
   -                
       ;
   -        ,      
     ,       -  ;
   -   ,   ,      ,   ,
      "".

     ,         :

 1.           
    "NO DIALTONE".   :
     -         
        .
       ....  .
     -         "" (  
        ),       
       ,       "notebook"  
       .
       ....       (  ).
     -   ,    .
       ....   ,   
              "AT X1"
        "AT X3",      .
     -        .
       ....     "AT X1"   -
        .
     -         - 
       .
       ....       
       ,          
               S6.      
       " " -        .
     -    .
       ....  -  .
     -      .
       ....    (    AT &L1
        AT X1)        ,     
         .

 2.   ,                 
     " BUSY ".       ,      
    ,  ..,          ,   
     "NO CARRIER"      .
      :
     -       .
       ....           
                ,    
       ,   /  "".
     -     .      ""
       ,      ,   ,
          .
       ....      -
          .
     -           ,   -
        ";"    "AT O",       
        .

 3.          ,      .
                , 
         ,        
           (          
           ).   ,  
               (    
      ).
    ....   -  "AT X2".

 4.       ,    ,     
           .  
          ,      - - 
              ,
             2100 .
            .
    ....    .    
       Bell 212A ( 1200 /)   
      (      
     ,        
    ,       ).

     ߶.   ,  - 
  .  ,     
       .
          (    ).
      ,    
    .        
 .      - 
 ,    ,   
     :

 1.          . 
       ( ,      
      )       
      .
    ....         
          ,        
     ,            
         .

 2.  "MaxCom-2400", "AnCom ST-2400"     
         ,  
    .           - 
      ,        
    .
    .....

 3.             
         , ..    .
            ,  
          .    
                 .    
    ,         
    ,            ,
          .          
           .

 4.            
            . :   
    "" ,      (   
     )    (    ).

 5.                     
      .       ,  
        (       1200 /)
    .               .
    ....           ,     
    .          .
     ,    2400 /,   
              . 
              
                 ,
        .          
           1200  /,         
    ,           
    .  ,       1200  /,
                   .
             
    ,         , 
              
     1200 /.

 6.             
        S9.    
    ,      ,  
             .  
        ,     .

 7.     ,      ,  
             ""  ,
         MNP. ....   
           (    ,     ,
          ..),     
       S10.     
                  
    ,    ,   "NO CARRIER". 
           
    "AT &C0",        
     "DCD"  .

    ۶.       .  
         "", 
      .      ,
              
 "retrain".       , 
"retrain",     .       -
 . .... ""    
 ( )     .
   ,    ,"" 
 .

    HOST.         
 .

 1.      ,   
    .      ,      
    ,      .

 2.                 
               
          ,         .
              
    (              
    ).          
             (      
    "RING"),         " "   .
          
    .

 3.         ,   
        ,      "host"  
    . ,      ,  
                
           .
    ....    :    ,
       S10,     
    .

[an error occurred while processing this directive]


[an error occurred while processing this directive]