
Full-Duplex Protocol
Chapter 10
1020
Figure 10.12
Message T
ransfer with Retransmission
Not Full
DLE NAK
OK
xxxx
DLE ENQ
xxxx
SOURCE XMTR LINK RCVR SINK
10049–I
DL
DLE STXxxxxDLE EXTBCC
(Timeout)
???CK
???
DLE STXxxxxDLE EXTBCC
DLE ACK
(Message Discarded)
1
1
Note that this is detected as a duplicate message.
Figure 10.13 shows a DLE NAK response to the initial message
transmission because the message sink is full. After the message sink is
no longer full, a retransmission of the message causes a DLE ACK
response.
Komentáře k této Příručce