摘要
目前用户接入网广泛采用混合光纤/同轴网(HFC)和非对称数字用户线(ADSL)技术,在此基础上建立ATM网实现ATM到家以适应未来宽带网的发展需要。基于HFC网的ATM网以ATM节点交换、用户终端单元和头端单元设备来作支持。而在ADSL上完成ATM交换业务时,则有两种方案可选:(1)通过在ATM交换机与ADSL调制解调器之间加数字用户线接入复用器实现;(2)将离散多音频(DMT)与ATM相结合。
The HFC and ADSL - based ATM access network is built to meet the demands of the broadband network development. The HFC - based ATM network is supported by the ATM nodal switching, user terminal unit and headend unit. The ADSL - based ATM switching service is provided alternatively by the implementatin of a multiplexer between the ATM switch and ADSL modem; or the integration of DMT with ATM .
出处
《世界电信》
1999年第2期19-21,24,共4页
World Telecommunications
