What Does Virtual Private Dial-Up Network (VPDN) Mean?

A virtual private dial-up network (VPDN) is a type of VPN that provides remote access services and capabilities to private networks’ dial-in service in addition to a shared infrastructure. It is a network mechanism for connecting remote and long-distance dial-in users with corporate or enterprise networks using a combination of PSTN and IP networking.

Techopedia Explains Virtual Private Dial-Up Network (VPDN)