This program, frankly, rocked hard. It beat the pants off of my buddy's USR dualie & ToneLoc, and it discovered some very cool shit. (Which does not mean I broke the law and hax0red all sorts of defensless dialup boxes; IMO the really interesting things aren't carriers -- they're little telco oddities, strange intercept messages, things like that.)
Both of these tools are in AppleSoft BASIC & require ZS.DIAL and ZS.EARS
dd if=catwarez.dsk of=/dev/fd0
equivalent in AppleDOS ..)