Here you can select the test mode and tone. 
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Tip: 
If you are unsure about the ADSL parameters, please apply the factory default settings.Wrong configurations may fail 
your Internet access. 
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4.2.11 UPnP 
UPnP (Universal Plug and Play) allows Windows based systems to configure the device for various Internet applications 
automatically. UPnP devices can automatically discover the services from other registered UPnP devices on the network. 
If  you  use  applications  such  as  multiplayer  gaming,  peer-to-peer  connections,  or  real-time  communications,  such  as 
instant messaging or remote assistance (a feature in Windows XP), you should enable UPnP. 
 
 
Enable UPnP: Check/uncheck to enable/disable the UPnP feature. 
 
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Note: 
UPnP is activated only when there is a live WAN service with NAT enabled. 
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