无源光网络(PON)并不是一种新技术,从上个世纪90年代开始,利用PON网络传输话音业务的窄带PON网络在国内得到了一定的应用,但是并没有标准化。上个世纪90年代末期,随着宽带业务的发展,结合ATM技术的PON网络APON一度被大家寄与厚望,认为ATM的多业务承载平台和廉价、可靠性PON网络 Passive optical network (PON) is not a new technology. Since the 90s of last century, the narrowband PON network that uses PON network to transmit voice services has been applied in China, but it has not been standardized. The late 90s of last century, with the development of broadband services, combined with ATM technology, PON network APON was once everyone’s hopes and expectations, that ATM’s multi-service bearer platform and cheap, reliable PON network