Ok, if you are going to use the batch process I've described here there are a couple of things to note.
1. Since you are creating a .DAT file every time there is an option in the tlcfg.exe utility in ToneLoc to Save .DAT Files.
It is on line 6 in the Scan Options sub-menu of the tlcfg utility which you run by executing tlcfg on the command line in DOS. Change this to N parameter to N. The .DAT files are somewhat useless, but when you execute the command I showed in the Batch file on the previous page toneloc 0000warl.dat /M:*6718005550000 > nul you have to create a .DAT file. If you don't change this parameter it just means that the .DAT files will pile up and although it's a disk space issue, what it does give you is a count of what happened since if you did every number and wrote every .DAT file then a record of that .DAT file should be there allowing you to cross check your results. The Tone Log will have a count of your results so you can cross check there if you need to. Enough said. Id change it to N and save the space.
2. Make sure there is room to write the log files and that you are not executing the program on a PGP mounted disk or some other logical disk that may auto-unmount during the process.
3. Keep it simple. Believe it or not modems that are older will handle this exercise very well, so will a 386, 486 or older Pentium machine. It's phone numbers gang so speeding up the dial process doesn't get you that much in this part of the exercise. What you seek is a good footprint.