To: David Klein who wrote (8471 ) 9/13/2000 10:30:02 AM From: justone Read Replies (1) | Respond to of 12823 David: I have to agree with Mike here, that the deployment of WLL is not likely to happen, in my opinion. About 3-5 years back there were efforts to improve WLL to support so called low mobility (hand-off at under 50 mph). Everyone was excited then: Marketing staff had invincible arguments and predictions similar to the ones you quote, if only you could offer mobility. Use it in Malls! At concerts! Around town! And everywhere at home! Big market! The low mobility was solved, with developments integrating Cellular SS7 technology with WLL. However, when suppliers went to check the market, they found that, with or without mobility: In the US: 1) cordless phones are are lot cheaper when you have wired access, and with DSS are of even better quality 2) even back then, the cost of high speed mobility was not substantial, and PCS/Digitial deployment was eminent, and who wanted to capitalize another set of hardware and towers? 3) who wanted the political hassle of deploying even more antennas than PCS? In Europe: 1) ditto on cordless 2) GSM was everywhere and dropping in cost; why go to a lower capability In Japan: 1) PHS was there already; they were basically getting rid of a system that was like WLL, but had low mobility, and going to high mobility and 2) they were going fiber (even FTTH) In India (I haven't personal experience with China, and other emerging companies, but I suspect it was the same: 1) they didn't have much of anything, including money, but they didn't want second rate technology (a pride issue, partially, but also a reasonable concern about being left behind in technology) 2) WLL might work in a village, but I don't know of any deployments (I haven't looked lately) 3) even WLL wasn't low cost enough; they would rather share a pay phone and use voice mail for incoming calls (actually a reasonable solution) The real issue that killed it, ultimately, in my opinion, is that GSM and other handsets dropped to a cost (AND WEIGHT) level about the same as a PHS or proposed WLL handyphone, and became ubiquitous. In fact, you can now get dual mode phones pretty cheaply now. Analog phones are also low cost. So I guess I don't see the market. It must be for areas where copper wiring isn't available, but Cellular AMPS/TDMA/GSM/CDMA/whatever are too expensive. Since the deployment of WLL requires almost as much equipment as cellular, and more antennas; ok, in GSM systems you can eliminate the BSC, but GSM systems don't need that anyway, and you can use a CO instead of a MSC, but the savings are not that large). So where is the cost savings of a WLL network? Even without mobility, fixed WLL systems require equipment that must front end a TR303 or V5.2 enabled switch, which is more costly than simple copper. Ergo, the network cost is about the same for WLL, cellular/PCS, and both are a bit more expensive than wireline. So whatever the cheerful marketers say, the technology cost points don't seem to back them up. justone opinion