User`s guide

42 DC 900-1406E
BSCTRAN Programmer’s Guide
Caution
If the user needs to ensure that binary data records (sent without
the
/TRANS option) are not concatenated when sent by the ICP,
message blocking should be set to off.
/TRANS This option specifies that BSCTRAN will instruct the ICP to
send the file in transparent mode. This option is necessary to
send files such as object or executable images which may con-
tain control characters that might be misinterpreted by the BSC
communication protocol. The BSC 2780/3780 protocol per-
forms translation of transparent data according to the setting
of the data translation configuration parameter. This option is
normally used with the
/BINARY option to send transparent
3780 data. For transparent 2780 data, only the
/TRANS option
should be used.
Cautions:
1. The ICP must be configured to the EBCDIC character set (or ASCII with no par-
ity) for the
/TRANS option to work properly. Also, Data Translation (option 10)
must be set to off when using EBCDIC to prevent the ICP from translating the
transparent text.
2. The ICP will send transparent data as if Message Blocking (configuration option
19) is set to off. That is, each message buffer from the client is sent as a single
transmission block on the link, assuming the transmission block is large enough.
The transmission block, therefore, should be at least the size of the largest record
+ 2 to prevent splitting of larger records. This proper combination of
/TRANS and
the appropriate transmission block size ensures that transparent record bound-
aries will be preserved.