| _API_POLL_STRUCT | Windows poll structure used to implement blocking poll for read/write/event |
| _wp_bert_status | BERT status and statistics |
| sangoma_interface | Sangoma Interface Class that deals with span/chan IO (read/write/events) |
| wan_cmd | Wanpipe Legacy Command Structure |
| wan_cmd_api_ | Wanpipe UDP CMD Structure |
| wan_iovec | Memory Descriptor of a single buffer. This structure used internally by libsangoma |
| wan_iovec_list | Fixed-length List of Memory Descriptors |
| wan_mgmt | Wanpipe UDP Management Structure |
| wan_msghdr | Variable-length List of Memory Descriptors |
| wan_udp_hdr | Wanpipe UDP Structure used for Maintenance and Debugging |
| wanpipe_api | Wanpipe API Command Structure |
| wanpipe_api_callbacks | Wanpipe API Callback Structure |
| wanpipe_api_cmd | Wanpipe API Device Command Structure used with WANPIPE_IOCTL_API_CMD |
| wanpipe_api_dev_cfg | TDM API Device Configuration Structure |
| wanpipe_chan_stats | TDM API channel statistics |
| wp_api_element | Wanpipe API Element contains header and data |
| wp_api_event | Wanpipe API Event Structure |
| wp_api_hdr | Wanpipe API Header Structure |
1.5.6