Billion Electric Company BIPAC 8500 - Manual (Page 98)

Billion BIPAC-8500 / 8520 SHDSL VPN Firewall Bridge / Router
Chapter 4: Configuration
Example: Configuring your Router to Dial-in to the Server
Currently, Microsoft Windows operation system does not support L2TP incoming service.
Additional software may be required to set up your L2TP incoming service.
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