This interface connects digital stored-program-control exchange from PCM, and connects Ethernet from RJ45. By tacking on the appropriate IP heade, this interface encapsulates each Tl or El frame in an IP packet.

• 该网络接口系统一端通过PCM基群串行总线连接数字程控交换机，另一端经RJ45口与以太网相连。 网络接口系统用IP报头封装E1语音数据帧后，通过IP网络传送。