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Go On Hook

(Hang up the telephone handset)

 

 

   

 

   

 

4

3

 

2

 

Flash

 

 

 

  5

1

 

 

 

1 is dialed  

 

  6  

 

 

 

   

 

 

  7

   8

 

9

0

 

 

 

 

 

Once dialing 1 and letting go of the dial, it spins to the normal position.  This action causes the the dial to open and closes the line loop once causing the third selector switch in your central office to make one vertical step and then hunts across the first level for an idle trunk to the information switchboard.