Ed,
As a matter of fact we did a demo them for Durafon 1x before they decided the two way radio was so important. We had great phone coverage in their plant while on the phone but the walkie talkie was a bit short on coverage - seemed odd to me, since it is the same base/antenna. Not sure if an add on antenna would help that situation or not. They would be looking at the Durafon 4x for combining analog ports and less base units. Had Durafon in my mind, but sometimes I don't see the forest for all the trees.
Thanks, Bruce