A web television includes a display, a tuner, an internet module, and a PIP module. In one example embodiment, the present invention is applied to determining what combinations of packet loss rate and packet delay are tolerable where a packet switched telephony service is desired to be perceived to be substantially equivalent to a traditional toll-quality non-packet-switched telephone service. The apparatus also includes a storage unit that stores data obtained by the branch circuit block and an identifier of a child circuit block into which the data is input. The run-time prediction detects a calling pattern of the plurality of callers of the shared functional unit and predicts the next caller out of the plurality of callers of the shared functional unit.