A computer device may include logic configured to detect a mobile directory number (MDN) subscriber line transfer triggering event; identify a first user device associated with the MDN subscriber line, wherein the first user device corresponds to a connected device with respect to the MDN subscriber line; and identify a second user device associated with the MDN subscriber line, wherein the second user device corresponds to a non-connected device with respect to the MDN subscriber line. The logic may be further configured to determine that the MDN subscriber line is to be transferred from the first user device to the second user device based on the detected MDN subscriber line transfer triggering event and transfer the MDN subscriber line from the first user device to the second user device, in response to determining that the MDN subscriber line is to be transferred.

Systems for and methods of delivering telephone calls using the combination of a data channel and a voice channel are disclosed. A data channel connection with the telephone handset may provide pre-call information used to set up incoming and outgoing calls which are ultimately connected using a voice channel. Use of the pre-call information may permit the same handset to be associated with multiple secondary telephone numbers from which calls appear to have been made and to which calls appear to have been placed.

The present disclosure is directed to a method and system for routing communications. A plurality of communication devices are coupled to a communications network. Each communication device has a device identifier. A user-programmable database associates each of a plurality of user identifiers with a device identifier. A call-routing switch arrangement is coupled to the communication network through a portal communication device having a portal identifier. A user designates a destination user identifier when making a communication. The call-routing switches the call, directing the call to a destination device identifier responsive to the user-programmable database association between the destination user identifier and a device identifier. According to certain aspects, communications are directed to users and are routed to associated equipment, a user identifier serving as a virtual extension number. Users remotely program the database to direct their calls to communication devices at various geographic, voice mail and e-mail destinations.

In a cellular communication system a radio terminal registers a network based service, e.g. a Communication Waiting supplementary service. By transmitting a register request comprising a corresponding option tag, the radio terminal explores whether the network supports the requested network based service. In that case a user profile associated with the requesting radio terminal is updated and the radio terminal may henceforth use that service.

Systems for and methods of delivering telephone calls using the combination of a data channel and a voice channel are disclosed. A data channel connection with the telephone handset may provide pre-call information used to set up incoming and outgoing calls which are ultimately connected using a voice channel. Use of the pre-call information may permit the same handset to be associated with multiple secondary telephone numbers from which calls appear to have been made and to which calls appear to have been placed.