3 ms·
Actually, it wasn't "badly written firmware". Hayes modems actually looked for "+++", then a second or so of no traffic, before they would switch into command-m
by thristian 12y ago
Actually, it wasn't "badly written firmware". Hayes modems actually looked for "+++", then a second or so of no traffic, before they would switch into command-mode, and that delay was patented. So "Hayes-compatible" modems would implement the system without the delay, and as a result were vulnerable to remote DoS.
- hosay123 12y agoTo extend this a little further, various brands of modems (at least Rockwell) supported it but came with it disabled by default. You could enable it before dialling up by setting an S register