PACKHACK is a program used to analyze packet radio activity taking place on a specific radio channel. It identifies and counts packets from each station, and categorizes the packets into frame types. Generally, only "I" frames contain user information. The "RR" frames are Acks, the "UA" frames are Acks for disconnect requests, the "D" frames are disconnect requests, and the REJ frames are Reject, send again requests See a TNC-II manual for a complete discussion on frame types With PACKHACK you can see a list of stations on the air, and the number and type of each packet sent by each station You can see which node is most active and if most of it's activity is retries or real information. It is interesting to compare the ratio of I to RR frames for different stations and hopefully it will be useful too This version of PackHack works with data from either TNC-II clones or AEA PK232 TNC's