1: Voice channels must have A/D Converter in the input of it .
2: Data channels have not A/D converter .
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The scope of work and the educational requirements are the difference between data communication and data communication information.
a mlln circuit is a data circuit
The difference between a dial up connect and a direct connection is that a dial up requires a connection from a phone line to a PC and the data capacity is smaller. A direct connection can transmit large amounts of data at higher speeds.
Network data model is just like a normal database model. In network model the data is seen as related to each other by links. Or we can say the relation between the data is represented by links.
Classified data being sent over an unclassified system.