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I promised the group some input once I had a chance to play with my new Hayes 28.8 PCMCIA modem. Included below is an excerpt from comp.sys.laptops which relates some of my trials and tribulations. I apologise if some of you have already seen it. ---------------------------------------------------------------- > I am thinking of getting a pcmcia modem and can get a reasonable deal on > the hayes optima 28.8. I have a thinkpad 755ce. Has anyone tried this > combination what successes or probems does anyone anticipate? Well, I can come close. I use this same modem with a TP360C running OS/2 Warp. The IBM-supplied card and socket services software will recognize the modem with no trouble, so modem setup is pretty much limited to plugging it in. I did, however, have to make a couple of software tweaks in order to achieve higher throughput than what is attainable with a 14.4 modem. Specifically, the OS/2 comm port drivers (COM.SYS and VCOM.SYS) had to be replaced with Gwinn's SIO drivers in order to achieve a DTE > 57,600. Also, HyperAccess Lite refused to initialize this modem at all, and was therefore sent down the road in favor of VOC. Finally, modem initialization strings will be hard to track down for what is a relatively new model. I've found that the factory stored profile #0 works just fine for all software packages I've tried (Warp's IAK, ZOC, FaxWorks, etc.); therefore, the only initialization string you really need is ATZ0. I'd say go for it. The only real complaint I have with this product is the lack of decent documentation. Hayes doesn't even supply a list of AT commands in the so called "manual". You will want to call the Hayes BBS and download their technical reference manual for the Optima line, file name TRM288.TXT if I recall correctly. Good luck... -- Karl E. Yeanoplos Denver, CO kyeanopl@den.mmc.com / key@csn.net ---------------------------------------------------------------- I'd also like to add a little about data transfer rates. My old Megahertz 14.4 would max out at about 1600 cps on binary downloads. The best I've been able to achieve so far with the Hayes is about 2600 cps. Hopefully this will improve with further tweaking. - key