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37:– running at the same rate – so the receiver can sample the signal at the same time intervals used by the transmitter. No start or stop bits are required. For this reason "synchronous communication permits more information to be passed over a circuit per unit time" than
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are synchronous protocols that view the transmitted data as a stream of bits with no semantics, or meaning. Control codes are defined in terms of bit sequences instead of characters. Synchronization is maintained on an idle line by transmitting a predefined sequence of bits.
105:(SDLC) specifies that a station continue transmitting a sequence of '1' bits on an idle line. Data to be transmitted on an idle line is prefixed with a special bit sequence '01111110'b, called a
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71:(Bisync) is still in use, Other examples of byte-oriented protocols are IBM's
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in which "data is sent in a continuous stream at constant rate."
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characters when the line was not actively transmitting data or
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IBM Synchronous Data Link
Control General Information
119:(HDLC). Other examples of bit-oriented protocols are
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Comparison of synchronous and asynchronous signalling
152:Communications and Networking: An Introduction
130:Advanced Data Communication Control Procedures
111:International Organization for Standardization
33:in the transmitting and receiving devices are
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29:Synchronous communication requires that the
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219:Asynchronous serial communication
53:Early synchronous protocols were
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102:Synchronous Data Link Control
85:Digital Equipment Corporation
259:. You can help Knowledge by
116:High-Level Data Link Control
74:Synchronous transmit-receive
68:Binary Synchronous protocol
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178:Data Communications Primer
321:Physical layer protocols
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55:byte-oriented protocols
49:Byte-oriented protocols
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