NAT Total network security. This creates a virtual firewall. LAN ISDN Modem itself. Reduce ISDN costs using advanced ISDN tariff management. Control ISDN costs through the use of filters that are easily set in the configuration utilities.
Passwords prevent tampering.
Filter out specific IP protocols which consume a lot of bandwidth, such as RealAudio. Prevent broadcast traffic from reconnecting the ISDN line. This gives users instant access, eliminating the need for the DIVA LAN ISDN Modem to shake hands with the ISP's modem every time a new URL is requested. Data over voice Send data at inexpensive voice rates. Useful for sending large files overnight, this feature sends data at 56 kbps, as if it were a lower-priced voice call.