FIGS. 12A and 12B are a flow diagram of an embodiment of encryption synchronization for a terminating call, or a call in which a base station establishes a connection with an RU. At block 1202, the base station CPU begins transmitting a LCC message to an airlink DSP. In one embodiment, the instructions stored on the memory device 208 (FIG. 2) include a software program for synchronizing encryption