A brief description of the RPCNET architecture is given in the beginning of this manual, then, the protocols and the packet formats of RPCNET are described. 

More precisely, Chapter 1 deals with a general description of the RPCNET, Chapter 2 deals with the 1st level protocol (Line and  Reconfiguration protocols), Chapter 3 deals with the 2nd level  protocol (End-to-End protocol), and Chapter 4 deals with User-Level protocols, including the description of RNAM, the generalized  Access Method supplied by RPCNET. 

Appendix A is the hardware scheme of the BSC-modified line connection,  Appendix B gives an example of how the reconfiguration protocol  works, and finally Appendix C describes the packet formats.