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For those good folks who made suggestions about the problems I was having coupling my machine to a GPS receiver- many thanks. The problem was not with the TP755, but was in the documentation of the linking software. One person gently suggested that I RTFM. Well, I did RTFM and the problems turned out to be NITFM <grin>. ***for those interested, the following is a description of the setup and how it works*** I have an Eagle Accunav Sport hand held GPS receiver. There are four pins on the back. One is a common, one is an NMEA-183 input, one is for supplemental power and the last is for NMEA-183 output. The input pin is for coupling the GPS to a differential LORAN receiver for increased accuracy. The output pin outputs an ASCII stream that includes longitude, latitude, time, date and altitude of the receiver. Software from DeLorme Mapping accepts the input stream from the serial port of the Thinkpad and slaves the street map program MapExpert (on CD ROM) to the output. The result is that the street map stays centered on the laptop's screen as the laptop is moved around- as in a plane, car or boat. The refresh rate is adjustable, such as every 2-3 seconds and a dot or "breadcrumb" can also be left on the map every so many updates. For those not familiar with MapExperty/ Street Atlas USA (DeLorme), it is a CD ROM that contains every street, alley, road, highway, lane, river, creek, town, airport. . .etc. in the USA, including Alaska and Hawaii. The end result is incredible. By fastening the little GPS receiver to the back of the 755CD's screen and sticking the GPS's antenna (a little plate about 2" square) to the windshield, I can see where I am and where I've been anywhere I drive in the continental USA. When coupled with a trip-planning CD Rom, such as MapNGo (also by DeLorme), I can plan a vacation trip and see where I am as I travel. Accuracy of the GPS is degraded by our government, except in time of war, so that a terrorist couldn't use it to guide a cruise missile or to guide an airplane as a cruise missile. This degradation of the accuracy is presently in the +-50' or so range. That means your "trail of breadcrumbs" might wander from one side of the road to the other- but who cares? Without the degradation of the GPS accuracy, accuracy in the 10-15' range could be expected. However, by coupling the GPS to a Loran Differential beacon, accruacy of about 10' is expected even with the degradation of the GPS signal. Another side benefit of the GPS receiver is that you have an incredibly accurate time displayed for setting your watch <grin>. Thanks again to the good people who sent me their suggestions. DeLorme's support folks came through by having me set the baud rate to 4800 from the 9600 recommended setting (ITFM) and changing one other variable. Now- my next task is to get the modem working. Tom Thomas A. Gauldin Here's to the land of the longleaf pine, Raleigh, NC The summerland where the sun doth shine, BSRB45A on Prodigy Where the weak grow strong and the strong grow great, FAX (919) 676-1404 Here's to Downhome, the Old North State.