September 1981 RFC 795 Service Mappings AUTODIN II The service choices are in two parts: Traffic Acceptance Catagories, and Application Type. The Traffic Acceptance Catagories can be mapped into and out of the IP TOS precedence reasonably directly. The Application types can be mapped into the remaining IP TOS fields as follows. TA DELAY THROUGHPUT RELIABILITY --- ----- ---------- ----------- I/A 1 0 0 Q/R 0 0 0 B1 0 1 0 B2 0 1 1 DTR TA --- --- 000 Q/R 001 Q/R 010 B1 011 B2 100 I/A 101 I/A 110 I/A 111 error Postel