公开(公告)号：US20180034971A1

公开(公告)日：2018-02-01

申请号：US15224967

申请日：2016-08-01

Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.

Inventor： Bernard KU ,  LAKSHMINARASHIMHAN NAIDU ,  JAMES W. FORSYTH

IPC: H04M7/00 ,  H04L29/12

CPC classification number: H04M7/0063 ,  H04L61/1511 ,  H04L61/157 ,  H04L61/304 ,  H04L61/605 ,  H04M7/0075

Abstract: Aspects of the subject disclosure may include, for example, responsive to determining that a second device is associated with a first carrier network, obtaining a first record associated with a called number of the second device from a first carrier network telephone number mapping equipment server of the first carrier network, and transmitting a first internet protocol address for the second device from the first record to a terminating call session control function server of the first carrier network to initiate the internet protocol call session. Responsive to a second determination that the second device is associated with a second carrier network, obtaining a second record associated with the called number according to a pointer to a second carrier network telephone number mapping equipment server of the second carrier network, and transmitting a second internet protocol address for the second device derived from the second record to a session border controller of the first carrier network to initiate the internet protocol call session. Other embodiments are disclosed.