iwfCOCA²⁵⁴³³⁷⁺⁶BNC¹⁷³⁹⁹⁵⁺² 基本例句 InterWorking Function,交互作用功能 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。 fabiao