User`s guide

B: BSC 2780/3780 Control Procedures
DC 900-1340I 211
B.1.2 Normal Link Start
To start link operation, the client issues a Link Configuration command (Section 5.4.1.4
on page 120) followed by Start Link command (Section 5.4.1.5 on page 121) to enable
the link. If the client does not issue the link configuration command, the configuration
set by the previous link configuration command (or the default configuration) takes
effect when the link begins operation. If the
cfgLink and enable DLI configuration
parameters are set to “yes” (their default values), the DLI automatically performs the
link configuration and enabling, using the configuration settings supplied in the session
definition in the DLI text configuration file (Section 7.2 on page 188).
Figure B–2 shows an example start sequence.
Note
In blocking mode the start acknowledge is implied by a successful
Start Link command.
Figure B–2: Start Link Sequence Using Two Commands
Client Freeway
Remote Station
Link configuration
dlWrite
dlRead
(
DLI_PROT_RESP_BIND_ACK)
Start acknowledge
any period of time
…
(DLI_PROT_CFG_LINK)
…
dlWrite
(
DLI_PROT_START_LINK)
Start Link