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加拿大北方电讯公司(NT)新的 Meridian SL 系统最引人注目的特点之一,就是它把电路交换和分组交换完善地综合在一个网络里的系统结构。用户对此可能不会马上理解,但正是这种系统结构很易于提高办公室通信系统的功能及质量。贝尔北方研究所(BNR)的工程师们提出的这种结构设计,使已经装备了 NT 公司的 SL-1或 SL-100交换机的用户能把已有的设备扩充为新式的 Meridian SL-1或 Meridian SL-100综合业务网络,而且可在已装在大部分办公室的普通电话线的基础上进行。
One of the most striking features of the new Meridian SL system at Nortel Canada is its system architecture that perfectly integrates circuit switching and packet switching in a single network. This may not be immediately understood by users, but it is this system architecture that can easily improve the functionality and quality of office communications systems. This structural design by engineers at the Bell Northern Institute (BNR) allows users already equipped with NT’s SL-1 or SL-100 switches to expand existing equipment to the new Meridian SL-1 or Meridian SL-100 integrated business network, but also in the majority of offices have been installed on the basis of ordinary telephone lines.