User`s guide

B: BSC 2780/3780 Control Procedures
DC 900-1340I 219
Figure B–8: Two-message Sequence with Priority Message Interrupt
Client Freeway
Remote Station
Message B
ACK0
ENQ
EOT
Block A1 (ETB)
ACK1
ACK1
Message A
(DLI_PROT_RESP_LOCAL_ACK)
Data Acknowledge B
Block A2 (ETB)
Block A3 (ETX) *
RVI
EOT
ENQ
ACK0
Priority Message (ETX)
Normal Data (EOM)
ACK1
EOT
ENQ
ACK0
Block B1 (ETB)
ACK1
Block B2 (ETB)
Block B3 (ETX)
ACK0
ACK1
*BSC 2780/3780 software has the continue setting configured for RVI handling.
dlWrite
(
DLI_PROT_SEND_NORM_DATA_EOM)
dlWrite
(DLI_PROT_SEND_NORM_DATA_EOM)
dlRead
dlRead
(
DLI_PROT_SEND_NORM_DATA_EOM)
dlRead
(
DLI_PROT_RESP_LOCAL_ACK)
pOptArgs.iICPStatus
=
DLI_ICP_ERR_RVI_GOOD_RECV
Data Acknowledge A