因为当全部读取消息时，非阻塞通道没有给出任何提示，所以强制我们在协议层处理这一情况。
Because nonblocking channels give no indication when a message has been fully read, we are forced to handle this at the protocol layer.
文中在讨论宽带综合业务数据网（B-ISDN）网络分层模型的基础上，介绍了实现APON系统中ONT的总体方案功能模块图，并根据协议和ONT技术要求提出了通道层硬件电路设计。
The paper introduced the functional block schematic of realizing the whole ONT in APON based on the network model of B-ISDN and bring forward path layer system design according to the protocol.
MSO 9404 A添加了16个集成的数字通道，能够充分利用可选的综合协议查看器迅速找出导致错误的物理层问题。
MSO9404A adds 16 integrated digital channel, can make full use of the Optional Protocol integrated viewer quickly to find out the physical layer wrong.
MSO 9404 A添加了16个集成的数字通道，能够充分利用可选的综合协议查看器迅速找出导致错误的物理层问题。
MSO9404A adds 16 integrated digital channel, can make full use of the Optional Protocol integrated viewer quickly to find out the physical layer wrong.
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