Bell System Practices 636A User manual

 
 
 
  

  
 
 
     


     
 
 
        
  
        
 
    
       
 
    
  
        
 
 
       
       
         
        
    
      
        
 
 
         
   
      
    
     
       
  
       
  
         
       
        
 
       
     
      
   
    
      
    
 
   
      
       
        

       
       
        
       
         


       
    
       
         
     
      
         
    

  
   

 
       
  
     
        
        
    
   
       
       
     
  
     
      
       
    

      
 
    
        
       
           
    
 
      
    
   
      
   

   

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 

    
       

  
  
   
  
  
   
   
  
   
    
 
  


  
       





    















    
   
     
    


    
  
  
  
 
    
     
    
      


 



    
 
  





    
  







 

  
    
 




 




 
   
 
   



 
 



 

       
  


 
  
 



 
  
  



 
  

  

   



  

 
          
  


 
  
      
         
    
  
 

            
 
       
        
    
           
 
  
        
    
















   
 
 
 
    
    
   
    
     









   
  
 
  
  
 


   
  
 







 


  
      
   
   


 
      
  


 


    
  





  

 
 

 
  
 
  
  
  
 
 
    
    
   



  
 
 
    


 


  

 
   
 
  

 
 
 

   

    
 

 
 

 
 
 
  


 

   
  
              

      













 























  

 






 
 








 




 
 
 


 













 
 








 




 
















   


   





 



 
 

 












  




 
   
 







 




 

 
   



 

 





 










 

 
 
 

  





 
 


 

 
 
 
 
 


 
 
 




















 









   
 

 

 






 




 

 







 



 
 




 




   


 



             
    
         












   
      
    
           





   
      
   
  
  
       
    
    
     
    
   
   

      
      
      
     
     
     
     
   
   
       
   
      
    
        
    
   
    
   
     
      
    
   


 
 
 
 
 
 
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    
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   
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   
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    
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 
    
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
       
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  
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  
 
     

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   
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 
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  
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 
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  
  

 

  


  

 
 
 



 
 
 


  


 
 


             
    
   
 



 






             

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
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
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 
  

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 
 
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 
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
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



  
 
 

 


 



 









  
             
  
            






           
 
  
   
     
       
            
            
           
             
                 
   

         
             
        
          


               
   
        

 
    
    
                  
  

         

                
  

       
    
                      
                       
    
          
  
 

                         
  
                        
                        
                  
       
     
      
        
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
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
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 
 
    
               
          
              
    
               

          
           
        
  
                
      
           
           
         
              
    
             
             
            
    
          
               
         
   
 
   
      
      

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
 
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              
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

              
   
     

















         
    
   
      
 

 
 


 
   
 

 


 
 
   
 

  
   

 

 
  


  



  
 
   

  


 

 


  
   
 


 
 
 
 





 

   

 

 



 
 
  


 
          
    



   
    
   
 
  
   

  
 


 


 


 

 


 
 

 
  
 
 
 
 
 


 
 


 

 

 








 

 
 

 
     

 
  
  
 

  



 







 

 





 






 
 

 

  
 

 
 
 


 

  


 


 
  


  







 
 

























 

 







  















 




    


 




 

 

   
  


 



 


 


 
 

 
  
 
  


 
 
  



 






  
  


















 
 
 
      

 
       
      
       
       
       
       
       
       
       
       
       
       
       

            
        
        

           
   
           
      
        
        
          

   
    
    
     


   
 

   
  
  
    

     
  

    
 
     
 
 
   
  
  
   
    
  
    
 
  

   
      
   
    
    


 
 
 
  



 




   

 
 
 

   
    
 
 

  

 
  
    
 
  

  
 
 
             
                
           
 
   
 






 







 

 
 


  

    







   


 











 






  





 

 











   





   

   

    
  


  

  
  
     
    




   
 


 
  
  









 

 
  




   
 
 


 
   
  

  
          
 
      



  


   
  
   

 

 
        

  
 


 

 
 
  
  

  

    



 
       
  

   
 
 
  
          
         
       
      
           
         
     
     
    
      
     


 

 
 
 



 
 
 
 


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

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

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 







 


 
 





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



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

 



 
 
   



 
   
 

   
 
  
 

   
      
 





 
  

 

  
 
 
  

  
 
     
      