分组交换除了进行数据交换外,同时还能传输语音。利用VoIP技术,可把公网的长途通过数据网络进行旁路。目前,银行的数据网络基本都用光纤或帧中继互连,有充足的带宽以满足语音传输的需要,使实现语音大集中成为可能。 In addition to packet switching data exchange, but also transmit voice. Using VoIP technology, public network long distance can be bypassed through the data network. At present, the bank’s data networks are basically interconnected by optical fiber or frame relay, and have sufficient bandwidth to meet the needs of voice transmission, making it possible to implement voice convergence.