Methods of filling bone cavities are provided. The memory module is a card approximately 151. The method includes receiving a packet from the source phone at the NAT. A plurality of equilibration circuits are also included in the circuit, each equilibration circuit coupled between one of the pairs of complementary digit lines and operable to equalize the voltage level on each pair of complementary digit lines to a predetermined level responsive to an equilibration signal. The part of the second beacon received by the apparatus does not comprise complete information regarding a second periodic restricted access window of the second beacon. Drains are formed in the tops of both receptacles, the tops having a drainage surface with a concave profile to direct water to a centrally positioned drain opening.