SIP SERVER 的构建 说明文档，同时有FXO和FXS的详解说明-SIP SERVER construction documentation, while there FXO and FXS of the Detailed Descr iption

底层驱动的程序代码-对FXO FXS进行电话通信功能的实现。-The low level code-with the mobile communication compliance in the FXO and FXS

FXO/FXS cape driver for BeagleBone board FXX_DRV_VER 0.1 AM335 interface functions: int ioctrl_init(void) int ioctrl_cleanup(void) uint32_t *ioctrl_remap(uint32_t *addr_ptr, size_t block_len) int ioctrl_unmap(uint32_t *addr_pt