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 [MMC 100] Station Lock
 --------------------------------------
 Allows the system administrator or
 technician to lock or unlock an
 individual station or all stations
 simultaneously.

 ** Options :
    - Unlocked   : Unlocks a locked 
        station
    - Locked out : The mode just not 
        allowed to access CO line foor 
        dial out                 
    - Locked all : Not allowed to init-
        iate any action with this mode        
    
 ** Default : Unlocked