Abstract: In various embodiments, a mobile device connected to a cellular network performs a credential exchange with a telephone not connected to an Internet Protocol (IP) network. The mobile device relays, via the cellular network, registration information between the telephone and a telephony interconnect service, based in part on the credential exchange. The mobile device receives an indication of a telephone call associated with a user of the mobile device. The mobile device proxies, via the cellular network, the telephone call between the telephony interconnect service and the telephone.

Abstract: A method of integrating wireless and wireline billing information in an integrated wireless-wireline system. Existing Automatic Measurement Accounting (AMA) capabilities resident in the Advanced Intelligent Network (AIN) Service Control Point (SCP) of the wireline section are leveraged, thereby avoiding development of an independent billing capability in the wireless section. Problems associated with the allocation and exchange of the wireless call identifier are avoided.

Abstract: An integrated wireless wireline system (IWWS) architecture without the requirement for dual-tone modulation frequency (DTMF) signaling to communicate a called party's number from the wireless section to the wireline section, thereby expediting call setup and making it more reliable.