A voice call is transported through diverse network paths including a
switched telephone network and a wide area data internetwork, for
example, the Internet. In routing the call, common channel signalling is
used to provide data identifying a calling subscriber line from a calling
PSTN, which information can then be transported through the separate data
internetwork to the destination PSTN, at which the data is then extracted
and sent to the called subscriber line while completing routing of the
call. A route for the call is established at gateways connected to the
data internetwork at the interface points with the calling and
destination PSTNs, calling subscriber line information and dialed digit
information being conveyed to the gateways. The destination end gateway
initiates a call connection to the calling subscriber line via the
destination PSTN to complete routing of the call, while supplying
identification of the calling subscriber line in a form recognized as
such by the called PSTN. The called party central office can then provide
caller ID services.