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VoIP subscriber gateways  45 
 
On  the  page  of  advanced  settings  you may  combine printers  into  groups,  control tasks,  change  printer 
settings and print text pages. All the necessary information and help with print server settings may be found on 
the www.cups.org web site.  
To record changes into the non-volatile memory, click ‘Apply’ button. 
3.1.4  ‘PBX’ menu 
Use  ‘PBX’  menu  to  configure  VoIP  (Voice  over  IP):  SIP  protocol  configuration,  QoS  (Quality  of  Service) 
settings,  FXS  interface  configuration,  acoustic  signal  setting  of  line,  setting  of  call  groups  and  groups  of  call 
intercepting, installation of codecs and dial plan. 
3.1.4.1 ‘SIP’ submenu 
Use the menu to configure the device for operation via SIP protocol. 
SIP (Session Initiation Protocol) is a signaling protocol used in VoIP. It provides basic tasks for call control 
(for example session start and finish).