
Full-Duplex Protocol
Chapter 10
1018
Figure 10.10 shows a DLE NAK response to the initial message
transmission. After the message is retransmitted, a DLE ACK response is
given.
Figure 10.10
Message
Transfer with NAK
Not Full
DLE ACK
OK
xxxx
DLE STXxxxxDLE ETXBCC
xxxx
SOURCE XMTR LINK RCVR SINK
10047–I
DLE NAK
DLE STXx??xDLE EXTBCC
Figure 10.11 shows the transmitting station sending a DLE ENQ sequence
after a timeout because it did not receive the initial DLE ACK response.
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