ftdm_channel_sig_write_t 502 src/include/private/ftdm_core.h ftdm_channel_sig_write_t sig_write; ftdm_channel_sig_write_t 335 src/include/private/ftdm_types.h typedef ftdm_status_t (*ftdm_channel_sig_write_t)(ftdm_channel_t *ftdmchan, void *data, ftdm_size_t size);