Dynex is the brand of modem, the company that packaged it. Motorola is the company that made the actual chip (SM56). There are only about 5 different drivers that cover the remaining dialup modems left on the market so the drivers used are specific to the chipset and not the brand.
Chances are very good that your modem is fried. I go through this after thunderstorms here in S TX with my rural customers who are still on dialup. This is similar to the one I have been using/buying http://www.newegg.com/Product/Product.aspx...4-003-_-Product
It has a Lucent/Agere chipset and seems to work well with telcos. It's cheap, and I get a volume discount at some sellers. I avoid USR softmodems like the plague. Make sure you run some sort of line protection on those phone lines. Sadly, many suppresors still don't clamp fast enough to avoid killing a modem, but it is better than nothing. If you are lucky all you lost was a modem, and not a motherboard slot.
Edited by dpunisher, 14 May 2010 - 12:25 PM.
I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)
3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)