User's Manual

44
SIP ALG
The Session Initiation Protocol (SIP) is used to begin, change, or
end a session, and an Application Layer Gateway (ALG) is
a security component for checking the status of data packages.
To complete an SIP ALG, enable the SIP ALG Settings function.
1. Select Enable to enable the SIP ALG.
2. In SIP ALG port, specify the SIP port number provided by
your Internet service provider. Click Apply.
UPnP
For devices that support Universal Plug and Play (UPnP),
enabling the UPnP function will allow automatic port
forwarding that helps your UPnP devices communicate with
the Internet.
1. At the UPnP Status, select Enable to enable the UPnP port
mapping function.
2. Click Apply to apply the settings.