User`s guide

6: BSC 2780/3780 Link Configuration Options
DC 900-1340I 161
6.4 Number of Leading SYN Characters Option (4)
This option specifies the number of SYN characters to precede all transmitted data
blocks. Certain links may require more SYN characters to ensure synchronization on
poor-quality lines. The minimum number of leading SYN characters is two; the maxi-
mum number is eight.
To set this option using the DLI configuration file, use the numLeadSync parameter; for
example,
numLeadSync = 3. See Table 7–2 on page 191.
6.5 Protocol Option (5)
This option indicates the protocol used on the ICP and has only one setting
(
“BSC3780”). This setting is reported in the configuration report (Section 3.4.2.2 on
page 72) which can be used by client application programs to verify the protocol run-
ning on the ICP.
The DLI configuration program (Chapter 7) considers this protocol option to be proto-
col-independent, but it must be set to
“BSC3780” in order to select the BSC 2780/3780
protocol. This parameter must be set prior to any attempt to assign another
BSC 2780/3780 configuration option within a session definition (see Figure 7–2 on
page 189); otherwise the DLI configuration program will fail.
To set this option using the DLI configuration file, use the protocol parameter; for exam-
ple,
protocol = “BSC3780”. See Table 7–2 on page 191.
6.6 Parity Option (6)
When using the ASCII/LRC-8 or ASCII/CRC-16 character set, this option controls the
setting of bit 7 of each character. Parity can be set to odd, even, or none (space parity).
Any transmission containing a parity error is detected by the receiver hardware, and the
appropriate error recovery is taken by the BSC software. If no parity is selected, bit 7 is
set to zero for all transmitted characters. Parity is automatically disabled when the