User`s guide

170 DC 900-1340I
BSC Programmer’s Guide
6.15.3 DCD Signal
The modem control option allows a link to use the data carrier detect (DCD) signal as
DSR. With either the HDX-3 or FDX-3 setting, line activity ceases when the signal on
the DCD pin is lost. With either the HDX-2 or FDX-2 setting, incoming DCD signals
are ignored by the BSC software. With either the HDX-4 or FDX-4 setting, line activity
ceases when the signal on either the DSR or DCD pin is lost.
6.16 Safe Store Option (17)
The safe store option enables or disables the safe store capability of the BSC software.
See Section 5.4.1.7 on page 123 for more information about safe store.
To set this option using the DLI configuration file, use the safeStore parameter; for
example,
safeStore = “no”. See Table 7 –2 on p ag e 19 1.
6.17 Message Blocking Option (19)
This option controls the logical blocking and deblocking of data between message buff-
ers and transmission blocks during normal link operation. Normally, the ICP message
buffer size (Section 5.4.1.3 on page 119) is configured to be much larger than the trans-
mission block size (Section 6.8), but this does not have to be true in order for message
blocking to work. See Section 2.3.4 on page 40 for more information on message buffers
and transmission blocks.
To set this option using the DLI configuration file, use the messageBlocking parameter;
for example,
messageBlocking = “dataBlk”. See Table 7–2 on page 191.
Figure 6–1 through Figure 6–4 show message blocking set to disable compared to mes-
sage blocking set to data blocking. The figures use an ICP message buffer size of 1024, a
transmit buffer size of 512, and a receive buffer size of 4096.