First good catch after updating the scripts for capturing the audio on attempts at toll fraud through an asterisk server, some calls with incoming audio logged to disk, and some with absolute silence. The calls with audio have serious noise in the background, my best guess is airco noise. But some typing can be heard, some other sounds and one even with a word at the end. I added some audio from that last one.
Boiler-room type telecoms fraud operation? You decide!
What this does mean to me is that someone is actually doing real work to find opportunities for routing calls without paying. This is not an automated script, this is an actual person doing the work.
Listen to audio attachment: