I remember dialling into the local internet service provider around the time the 2 competing 56k standards were around. I cant recall the names of them, but one answered with a "bong bong" sound, the other with the high speed ticking buzzing sound.
I must be a nerd, my job involved data communications and years ago I could actually hear the negotiation sounds of various modems and tell what was happening and where it went wrong. I could actually whistle to older 300 and 1200/75 modems and get them to "talk" to me
Im a NERD
Ahh I remember 56k FLEX and V.90 I think, Rockwell and USR, US Robotics (3Com) were the competing brands i think.