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Two DTEs are communicating via modems and RS-232C interfaces over a half duplex link. Data transmission is one directional with each message of length M. After a message is transmitted, the sender waits for a CTS message of length na before sending another message. Assume error-free operation and the following parameter values:
• R (line bit rate) = 9600 bps
• M (message length) = 1000 bits (all data bits)
• nh (overhead in each message packet) = 24 bits
• na (acknowledgement length) = 24 bits
• tp (propagation time in one direction) = 1 msec
Minimum transition time between states (1, 3) and (1, 1) (CTS delay) is equal to 10 msec at message transmitting end, and 20 msec at message receiving end (CTS transmitting end). All other delays during message transmission and reception are assumed to be negligible. For the stated conditions, determine the effective data rate in bps.
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