Appendices
197
Phase 2: Data Transmission
! Normal phase 2
The sending station first sends a transmission block containing the heading text. Each time the sending
station receives a sequence of DLE ACK and IDs from the receiving station, it sends a transmission
block containing the data texts as shown below. Upon receipt of a sequence of DLE ACK and IDs in
response to the last transmission block (data text n), the sending station shifts to phase 3.
If a transmission message contains no data text, the sending station transmits the heading text only.
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