In the EPON system, for the received buffer limit, frame loss often appears in either OLT or ONU, but now some existing methods are not efficient to solve it .
在EPON系统中，由于接收缓存区深度的限制，OLT和ONU中将经常出现不同程度的帧丢失现象，通过分析可以发现现有的一些机制对解决这个问题不是很有效。
The main module of OLT equipments includes power supply module, OBC module, IWF module, EPON module and so on. Service models mainly include HSI service and IGMP service.
OLT设备的主要模块包括电源模块、管理模块和交换模块等，业务模型主要包括高速上网业务和组播业务。
The communications equipment, including EPON communications equipment (OLT, ONU) and power line carrier communication equipment.
通信设备主要包括EPON通讯设备(olt、onu)及电力线载波通信机。
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