v17.asc      Recommendation  V.17  2-WIRE  MODEM  FOR  FACSIMILE
v32bis.asc   V.32 bis DATA  COMMUNICATION OVER  THE  TELEPHONE  NETWORK
v42_err.asc  ERRATA SHEET FOR BLUE BOOK VERSION RECOMMENDATION V.42
v42bis.asc   DATA  COMPRESSION  PROCEDURES  FOR DCE