488     6   

      1991 ,   -
  ,     -
   Andrew Corporation.

     32-, 16- 8- -
   Pirelli,    .  -
    350  .  ,  
         
 1000 .

      SDH 
1  (155 /)   TN-1X  Northern Telecom
(Nortel),    63  1  2 / -
.        
   (     
    )    --
,    ,    -
 .     ,   
  .

         -
   .       
        
    ,     -
   .      .
  ,        
    ,        -
    , 4-  SDH (622 /).

      -
           
.    4  (622 /)   -
 TN-4X  Nortel.      
     NRM (Network
Resource Manager).       
 1  4 .       
,    ,     -
:     ,    
    ;   , -
     ,   .

    TN-4X    
,        .

       -
,       .
      : , 
   .   -
    ,      -
  .