at the risk of crucifiction, i will say that the Global Village modems are NFG.
the last one i had that worked well was a 28.8 years ago and the ones i had after that were sliding downhill badly... and all my relatives that used them had virtually the same experience as i did. i had a teleport 56k and it was a complete exercise in frustration... and my last GV modem. i use a Zoom DualMode and it has always connected me first time every time and at a decent connection speed, currently 50,667 bps using earthlink as my ISP and my Mac connects at that speed every time. of course i am dying to get DSL but am waiting for rates to drop a bit more and availability is also a problem, Mac-friendly availability that is. i am somewhat non-plussed that in the face of the popularity and sales figures of recent Macs that these dinosaurs don't get wise and take care of Mac users as regards DSL, etc... hell, it is easier to support Macs on their damn networks than it is pc's... a friend of mine recently (ok, it was a few months ago) became a 'beta' subscriber to timewarner cable modem service here in Manhattan and they sent a bunch of service rep's out to see what was involved with getting a Mac on their network. the windows-only guy from timewarner was stupified by how easy it was and said so: "is that all there is to it?" ok, so i was not there, but it must've happened that way because my good friend and true told me so.
but i digress.
your experience is not unusual. it has been blamed on many things, it seems to be a combination of a slightly improper modem script and a timing issue in the GV chip as well as the iMac modem's chip, or so i have read.
i suggest you try every modem script that is remotely likely to work, and you can find most of them by going to www.versiontracker.com
and using the search engine there to search for keywords 'modem script'...
also, try the Apple Modem Script Generator http://asu.info.apple.com/swupdates.nsf/artnum/n10664
and ALSO, use the little 'search' link on this page (upper right hand side of this page) to search the forums for the keywords 'modem script'
you may also have to do some ISP-hopping to find one that 'likes' your modem... i've done and seen it happen with GV modems! that is, unless you decide to do a mercy-killing and rid yourself of that GV, of course. a nice blow with a 24 ounce hammer should do it.
i'll ship you the hammer, free of charge. say the word.
[This message has been edited by wlonh (edited 02-28-2000).]