目前使用的话音或数据通信信道。
实现低延迟、因特网类型的数据通信需要特别设计分组数据信道。
Achieving low-latency, internet-type data communications requires specially designed packet data channels.
信道接入协议(MAC)是无线数据通信协议的重要组成部分。
Medium access control (MAC) protocol is an important component of the wireless data communication protocols.
DT MF信号具有优良的抗干扰性能和一定的抗多普勒频移的能力，广泛应用于语音信道的低速数据通信。
DTMF has perfect anti-interference and some anti-Doppler shift ability and is widely used for low rate communication in audio channel.
为了保证信息传输的安全性，往往在数据通信的信道编码中进行加密处理，在收方进行解密处理。
In order to ensure information transmission security, encrypt and decrypt was used in channel coding and decoding of data communication.
因此，在数据通信系统中不必发送训练序列，可以提高信道效率，同时盲均衡技术还可以获得更好的均衡性能。
So in the digital communication system a training sequence isn't transmitted, which can raise the channel's efficiency.
调制解调器的已调信号通过VHF通信系统进行二次调制，通过VHF通信系统的信道实现数据通信。
Modem signals will be transferred through the VHF communications system has a second modulation, through VHF communication system access to data communications.
文中提出的虚信道、虚链路和链接机构等概念，描述了公用数据通信网络的流程控制；
The concepts of the virtual channel, virtual link and chain mechanism describe the flow control of a common data communication network;
这样有效降低了查询的数据通信量，非常适合于配置较低、信道有限的移动终端实现多媒体信息的查询。
Therefore, this method can reduce the querying data transfer and it is suitable for the low configuration and the limited channel mobile terminal to achieve the media information query.
要在两地间传输信息必须有传输信道，根据传输媒体的不同，有有线数据通信与无线数据通信之分。
In between two transmission of information must have a transmission channel, according to the different transmission media, cable and wireless data communications data communications breakdown.
要在两地间传输信息必须有传输信道，根据传输媒体的不同，有有线数据通信与无线数据通信之分。
In between two transmission of information must have a transmission channel, according to the different transmission media, cable and wireless data communications data communications breakdown.
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