A method for providing a camp-on hold service comprises detecting a hold condition between a first user and a second user and establishing a call hold by placing the call on hold. A sleeve is fitted in the opening and, in one embodiment, is generally U-shaped and includes both an arcuate base and a pair of arms. The formulation provides whitening effects, decreased tooth sensitivity, strengthened tooth enamel, and remineralization. The invention further relates to parts of such plants, including the leaf and gametes of such plants. The kernel cryptographic framework interacts with the cryptographic cipher adapters as though the cryptographic cipher adapters are proprietary cipher modules.