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VoIP subscriber gateways  81 
4.2.6 ‘IPtables’ submenu 
Use the menu to view operation of the installed network filters.  
 
4.2.7 ‘Diagnostic’ submenu 
Use the submenu to check accessibility of the net node and determine data rout.  
 
Network Utilities: 
–  Ping – utility to check net connections on the base of TCP/IP; 
–  TraceRoute – utility to determine data routs in TCP/IP networks.