五、规划的预见性 大多数电缆厂商为它们的产品规定了15年的保质期。在这段时间内,变化是不可避免的,同时也是无法准确预测的。惟一的解决方法是设计网络时为满足网络变化和增长的要求而进行相应的规划。 1.未来的投资保护 在正常使用条件下,新型网络不应该在15年建筑物整修周期内限制系统的升级。经过精心设计的布线系统可以承受超过大多数局域网传输速率10～15倍的数据流量。这将允许在不改变布线系 Fifth, the predictability of planning Most cable manufacturers for their products provided for 15 years of shelf life. During this period of time, changes are inevitable and at the same time can not be accurately predicted. The only solution is to plan the network to meet the changing and growing demands of the network. 1. Future investment protection Under normal conditions of use, the new network should not limit system upgrades within the 15-year building renovation cycle. Well-designed cabling system can withstand more than 10% of most LAN data transfer rate of 15 times the data traffic. This will allow without changing the wiring system