A TDM Fabric to Framer Interface is a type of interface used in optical networking. TDM refers to time division multiplexing. Some commonly used TDM variants include:
TFI-4 TFI-5https://www.oiforum.com/wp-content/uploads/2019/01/OIF-TFI5-01.0.pdf TFI-5: TDM Fabric to Framer Interface Implementation Agreement
See also Optical Internetworking Forum
References