Several readers wrote me in response to last week\u2019s article about Nortel\u2019s efforts to send voice over wireless LANs. In particular, they pointed out that the place where WLAN phones might be most useful is in the healthcare industry.Nortel, as you\u2019ll recall, updated its WLAN product line with voice capabilities and introduced WLAN phone handsets and a device to optimize the connections.https:\/\/www.nwfusion.com\/newsletters\/lans\/2004\/0301lan1.htmlOne reader, whose e-mail address indicates he\u2019s in the healthcare business, wrote:\u201cThis is potentially a hot product, in healthcare at least. For about 10 years now campus-range wireless phones have been extremely popular for docs and nurses. Some hospitals were actually able to save the space usually used for nurse stations by arranging things so that nurse call buttons cause wireless phones to ring. The lower power compared to cell phones reduces the chance of interference with medical telemetry, and there are no per-phone monthly bills.\u201dI find all of this very interesting, and I had no idea these phones would have such advantages over cell phones. This definitely looks like the best application for such technology, and the vendors are obviously aware of this; as the reader pointed out, Symbol Technologies has been making wireless LAN handsets for some time, with some success in the hospital market.Further, the reader writes:\u201cHealthcare is a particularly good target since healthcare is starting to need WLANs for a number of other things, including, probably, wireless barcode readers for the newly mandated barcoded drugs. I think Nortel is rolling this out at just about the right time.\u00a0 And I'm a Cisco bigot.\u201dThere are other areas where such technology could be used, according to another reader:\u201cI am always finding a use for this type of mobility. In schools, for security guards, IT departments, in many different warehouse environments and assembly line environments.\u00a0 There are always managers and supervisors that are seldom at a desk.\u201dPersonally, I\u2019m always chained to my computer, and therefore my desk, but that\u2019s just the nature of my job.Yet another reader pointed out that I had the wrong idea about which phone such newfangled handsets would replace:\u201cThese wireless IP phones don't replace the cell phone. They replace the 900-MHz wireless phone or wireless headset. Phone technical support, telephone order entry, inside sales, and all those of us who are trying to multiplex while we talk on the phone live and die by these limited-area mobile devices.\u201dAgain - chain, computer, desk. As I\u2019m writing this newsletter, that\u2019s all I\u2019m doing, and not really multiplexing. But that\u2019s just me, and I appreciate those who wrote in with other perspectives.