A point-to-point connectivity is a dedicated link which connects two communication Servicesthat may be two nodes of a network, an intercom station between two locations in same intercom connectivity, a radio path between two points etc. In Voice and Data link is the communications channel which connects two or more communicating devices.
This Voice and data link any be the physical connectivity or it may be a logical connectivity that uses one or more actual physical connectivity links.
When there is link is logical, then the type physical connectivity should be specified likewise either its uplink, either data link or any be the fiber optic link or Point to Point Connectivity. This connectivity mostly used in computers networking which used to connect nodes of networks.