There are different types of point-to-point connections with differing bandwidths depending on the application. Common designations are the product names used by Deutsche Telekom such as direct data link (Datendirektverbindung - DDV) or standard point-to-point connection (Standardfestverbindung - SFV). Analogue point-to-point connections allow transmission of a defined frequency spectrum; digital connections are available in bandwidths ranging from a few kilobits to several gigabits.
In addition to limited bandwidth connections, fibre-optic P2Ps are increasingly being offered via so-called dark fibres without limits on usage or bandwidth. The name “dark fibre” stems from the fact that in the case of this point-to-point connection the customer himself is required to provide the “light" for information transfer.
Point-to-point connections use specific interfaces, such as G.703, X.21, Ethernet or others, depending on the type and the medium used. In order to provide point-to-point connections with high availability and low error rates, the connections in the superordinate, actively managed hierarchies can be automatically or manually switched to alternate routes.