6100 BSC Programming Manual

6100 BSC Concepts and Context
BSCPPSW, BSCPPNSW. This parameter specifies whether the line is
switched or leased. BSCPPSW stands for "point-to-point
switched." BSCPPNSW stands for "point-to-point nonswitched,"
and is the default.
The major differences between these options have to do with
connection. A nonswitched (leased) line is always connected; the
DTR signal is always on. Thus, parameters and functions related
to connection are not used or have only nominal effect.
TRANSMISSION CONTROL. The following parameters affect
the relationship between stations:
BSCIDEXCH. This parameter specifies that ID exchange is required
upon connection. It applies only to switched lines. The
protocol for ID exchange was described as "Circuit Assurance" in
this section.
BSCPTPT. This parameter specifies that the link uses
point-to-point BSC protocol, as described in this section.
By default, the protocol is HASP multileaving, described in
Section 2. There is no keyword that explicitly calls for
multileaving.
If you're using EXCHANGE to simulate a HASP multileaving
workstation, do not specify BSCPTPT. Do specify BSCPTPT to
simulate a 2780/3780 terminal.
If you're not using EXCHANGE but you want to use the multileaving
feature, omit BSCPTPT in the SYSGEN entry.
BSCSECONDARY. This parameter specifies that the station is a
secondary station. By default the station is a primary station.
The difference between the two types of stations was defined
under "Station Types," in this section.
If one station is a secondary station, the other should be a
primary station.
MESSAGE FORMAT. The following parameters affect the format of
messages exchanged on the link:
BSCITBSIZE<n>. This parameter specifies the length of each block
in a message that uses intermediate text blocking (ITB) in
transparent text. The value expresses the length in bytes,
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