CNET CBR-980, User Manual

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4.1.3.8 WAN Access Type -- PPTP
This option is typically used for DSL services. Some DSL service providers supply a special DSL
modem. This kind of modem only supports the PPTP tunnel to access the Internet, you should create a
PPTP tunnel that carries a PPP session and terminates on the DSL model. Once the tunnel has been
established, this kind of DSL modem will forward the PPP session to the ISP. As long as the PPP
session is connected, all the local users will be able to share this PPP session to access to the Internet.
Apply 3G or 3.5G transmission rate for the backup. Once Dynamic IP connection is disconnected, the
system automatically connects Internet via 3.5G adapter. If 3.5G signal is not available, it starts to
search downward for 3/2.75/2.5G signals until none existed.
Setting up the interval time to auto detect whether the Internet connection is lost or not. If yes, the
system immediately switches to 3.5G Internet connection and will disconnect automatically the original
PPTP connection recovers.