论文部分内容阅读
十年来,业界获得的经验不是处理性能,而是网络带宽。根据DSL和最近的AT&T-TCI交易,因而怀疑那些计划提供带宽的公司真的知道出路何在吗? 基于目前的市场实际,很难看到全速的DSL技术能够适应未来需要。在波士顿城区和郊区,Bell Atlantic公司提供Internet的ISDN服务,但是在一些社区,有线电视供应商MediaOne集团提供Internet服务。这些服务的价格并不昂贵,比起Bell Atlantic计划推出的DSL服务要更容易负担。 Bell Atlantic公司的ISDN服务每月收费20美元,电话费用不变,数据传输每分钟收费16到52美分。128K bps(同步语音传送时为64K bps)的速度并不高,但是物有所值。对于全时使用者和晚上或是每周有一两天在家办公的雇员来说,大多数公司很容易判断这个价格是否合理。 MediaOne以Ethernet速度提供无限制的接入服务,每个月收费大约40美元。对非全日工作的雇员来说,这笔支出要稍微贵一些,但是公司会接受这个价格,提供给全日在家工作的雇员。作为用户,用户不能为价格辩护,即使用户愿意获得这项服务。对用户而言,低于10美元的Internet服务更有价值。Bell Atlantic为DSL制定的价格是不可思议的,640K低速DSL从每月40美元起价,随着速度提高,到7.1M bps时每月收费110美元。现在并下是所有社区都有方便的
Over the past decade, the industry has gained experience that is not about performance but about network bandwidth. Given the DSL and recent AT & T-TCI deals, which of those companies planning to offer bandwidth really suspect? Anyway, based on the current market reality, it’s hard to see full-speed DSL technology adapted to future needs. In downtown Boston and suburbs, Bell Atlantic offers Internet-based ISDN services, but in some communities, the cable television provider MediaOne Group offers Internet services. These services are not expensive and more affordable than the DSL services planned by Bell Atlantic. Bell Atlantic’s ISDN service charges $ 20 per month, the cost of the call remains unchanged, and data transfers cost 16 to 52 cents a minute. 128K bps (64K bps for simultaneous voice transmission) is not fast, but it’s good value for money. For full-time users and employees who work from home at night or on the next day or two, it’s easy for most companies to judge if the price is reasonable. MediaOne offers unlimited access at Ethernet speeds, costing approximately $ 40 a month. For part-time employees, the cost is slightly more expensive, but the company accepts the price and offers it to employees who work full time at home. As a user, the user can not justify the price, even if the user is willing to get the service. Internet users under $ 10 are more valuable to users. The price Bell Bell made for DSL is incredible, with the 640K low-speed DSL starting at $ 40 a month and increasing its speed to $ 110 a month at 7.1M bps. Now and then all communities are convenient