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Chapter 3. Communications Operations of BHT-6000
[ 4 ] Transmission Control Sequences
Shown below is a typical message transmission sequence supported by the BHT-Ir
protocol. This sequence example does not include transmission errors or negative
responses.
S
O
H
E
T
X
C
R
C
S
T
X
E
T
X
C
R
C
S
T
X
E
T
X
C
R
C
S
T
X
E
T
X
C
R
C
D
L
E
D
L
E
D
L
E
D
L
E
I
D
I
D
I
D
I
D
D
L
E
D
L
E
D
L
E
D
L
E
•
•
•
•
•
•
•
•
Receiving StationSending Station
DLE ENQ and IDm*
DLE ACK and IDs**
Heading text
DLE ACK and IDs
Data text 1
DLE ACK and IDs
Data text n-1
DLE ACK and IDs
Data text n
DLE ACK and IDs
DLE ACK and IDs
Serial
number
Serial
number
Serial
number
DLE EOT and IDs
Establishment
of Data Link
(Phase 1)
Data Transmis-
sion (Phase 2)
Release of Data
Link (Phase 3)
*IDm: ID of sending station
**IDs: ID of receiving station