And many telecommunications equipment vendors are still supporting ATM. In addition, some technologies in ATM, such as switch frabic, fair queueing, congestion control, are much useful for researching work of IP switch routers.

• 通信设备制造公司也并不放弃ATM，而且ATM的有关技术，例如交换结构、公平排队、拥塞控制等，对研制IP交换路由器也有裨益。