Ex parte HOFFMANN et al. - Page 4




          Appeal No. 97-2763                                                          
          Application No. 08/580,790                                                  


               transmitting said error-detecting code words through the               
          respective exchange as a component part of said transition                  
          monitoring cells;                                                           
               evaluating said error-detecting code words at an exit                  
          boundary of the respective exchange and outputting an                       
          appertaining error message to a maintenance position                        
          responsible therefor given an information falsification that                
          is thereby identified;                                                      
               before the information cell blocks pass the exit                       
          boundary, replacing the transition monitoring cells by newly                
          formed transmission monitoring cells whose regular error-                   
          detecting code word respectively covers the entire,                         
          appertaining information cell block; and                                    
               wherein the information cell block is thereby faultlessly              
          transmitted over the respective virtual connection.                         
               The references relied on by the examiner are:                          
          Philip et al. (Philip)        4,197,523                Apr.  8,             
          1980                                                                        
          Izawa et al. (Izawa)          5,251,204                Oct.  5,             
          1993                                                                        
                         (filing date of Sept. 19,                                    
          1991)                                                                       
          Uchida et al. (Uchida)        5,313,453                May  17,             
          1994                                                                        
                                        (filing date of Mar. 20,                      
          1992)                                                                       
               Claims 1 through 8 stand rejected under 35 U.S.C. § 103                
          as being unpatentable over Izawa.                                           
               Claims 1 through 8 stand rejected under 35 U.S.C. § 103                
          as being unpatentable over Uchida.                                          
               Claims 1 through 8 stand rejected under 35 U.S.C. § 103                
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