随着Internet的飞速发展,各种新兴业务以及迎合其需求的专有网络也不断出现,但是原先针对不同业务、同时处理多种网络连接的运营方式已经束缚了企业的发展,它们希望通过一个单一、灵活的接入设备来提供多种混合业务,并在将来执行统一的接入协议,如IP,然而,不同的业务(如语音、? With the rapid development of the Internet, various emerging businesses and proprietary networks catering to their needs are emerging. However, the original operation mode of handling multiple network connections for different businesses has hindered the development of enterprises. They hope that through a single , Flexible access equipment to provide a variety of mixed services, and in the future to implement a unified access protocol, such as IP, however, different services (such as voice?