UART_cd_on
UART_cd_off
io_init_dce_rx_fifo 
lapm_rx_hdlc_frame
dp_modem_command
dp_read_dsp_ram
dp_write_dsp_ram
dp_clear_ram
dp_download_dsp
dp_modem_command_long
dp_regandor
Write_mdm_byte
Write_mdm_word
dp_regandor
dp_dsp_rom_checksum
Start_DCP
Stop_DCP
x_output_init
dp_periodic_task
dp_init_variables
dp_sleep_mode
