| 摘要 |
A selective call device (200) has a preassigned address port and a plurality of assignable sub-address ports (246), a receiver (204) for receiving a directory of information services and designated address assignments corresponding to the directory of information services on the preassigned address port and a user interface (216) for selecting an information service from the directory of information services to be received on an assignable sub-address port corresponding to a designated address assignment. The selective call device (200) also has transmitter (208) for transmitting a selection of a selected information service, a programmer (244) for programming the assignable sub-address port in response to a receipt of an authorization and for disabling the assignable sub-address port when a time period for the selected information service has expired and the receiver (204) for receiving the selected information service on the assignable sub-address port (246.
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