, the more equipment will be manufactured within the country, reducing the effect on mainland China's trade balance. Lastly, it is simply not possible to predict the behavior of any large bureaucracy as if its decisions were coming from an individual. Many individuals are needed to move any one decision for- ward, and as a result, a large bureaucracy is inherently conservative and slow. Politics aside, technological issues and high customer expectations create challenges for WLL as well. Foremost among them is call availability. In the developed world, we view the mobile telephone as ancillary to the landline network and do not expect it to be as available as a landline telephone. A cellular system might block 2 or 3 percent of its busy-hour calls (and occasionally 5 or 10 percent) and still be providing excellent service. However, for home or business service, we consider 1 percent blocking to be the upper limit. In addition, higher call quality, with calls free of static and virtually no loss of service during a call, is expected. Another difference in quality between mobile ser- vice and WLL is that WLL really does have to provide good coverage throughout the entire cell. For mobile service, 90-by-90 coverage (90 percent of the region having ac- ceptable service 90 percent of the time) is considered sufficient. However, this quality standard relies on the fact that customers will be mobile and that they will move through one area to another and try the call again. With WLL, however, the customer who lives in the area with poor coverage always has poor coverage. The result of all these technical issues is that the higher signal quality requirement of WLL will require higher base-station towers and more tweaking than a primary mo- bile telephone system, so it may be more difficult to engineer and more costly per user. However, it would still be likely to be less costly than landline local loop. Two other engineering components differentiate WLL from mobile cellular technol- ogy. The first is the WLL terminal equ