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.
Sending station
Heading text
DLE ACK and IDs
Data text 1
DLE ACK and IDs
Data text
DLE ACK and IDs
Data text n
DLE ACK and IDs
Receiving station
To phase 3.
