185AppendicesB.2 BHT-Ir protocol[ 1 ] Transmission Control SequencesShown below is a typical message transmission sequence supported by the BHT-Irprotocol. This sequence example does not include transmission errors or negativeresponses.S O HE T XC R CS T XE T XC R CS T XE T XC R CS T XE T XC R CD L ED L ED L ED L EI DI DI DI DD L ED L ED L ED L E• • • • • • • • Receiving StationSending StationDLE ENQ and IDm*DLE ACK and IDs**Heading textDLE ACK and IDsData text 1DLE ACK and IDsData text n-1DLE ACK and IDsData text nDLE ACK and IDsDLE ACK and IDsSerialnumberSerialnumberSerialnumberDLE EOT and IDsEstablishmentof Data Link(Phase 1)Data Transmis-sion (Phase 2)Release of DataLink (Phase 3)*IDm: ID of sending station**IDs: ID of receiving station
