Westermo MR Series - Manual (Page 275)

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Web Interface and Command Line Reference Guide www.westermo.com
Include LRC:
The LRC (Longitudinal Redundancy Check) is a form of error checking that may be required by
some TPAD terminals. When the Include LRC option is set to “Yes” the unit will check the LRC.
Include LRC line:
This parameter is normally set to “Off” so that any LCRs received from a TPAD terminal will
be removed before the transaction data is transmitted to the remote host. In most cases this
is acceptable before the network will provide error correction and so the LRC is redundant. In
some circumstances however, you may find it necessary to change this parameter to “On” so
that the unit transmits the LRC to the remote host along with the transaction data.
Force parity ASY:
When this parameter is set to “Yes”, the unit will always use Even parity when relaying data
from a remote host to a locally connected TPAD terminal. To allow data to pass through with-
out the parity being changed, set this option to “Off”.
Strip parity line:
Setting this parameter to “On” causes the unit to remove the parity bit from transmitted pack-
ets.
Force parity line:
When this parameter is set to “Yes” the unit will always use EVEN parity when relaying data
from the locally connected TPAD terminal to the remote host. To allow data to pass through
without the parity being changed, set this option to “Off”.
ACK data:
This parameter causes the unit to acknowledge TPAD data packets from the terminal. This
param eter should normally be set to the default value of “Yes”. Note that this parameter is only
used if no Poll chars are defined.
DTE re-transmit:
Setting this parameter to “Yes” will cause the unit to retransmit the APACS 30 string if an error
is detected.
Delete STX/ETX:
Setting this parameter to “Yes” will cause the unit to strip off the STX and ETX characters that
nor mally surround the APACS 30 string.
No ENQ char:
Under the TPAD protocol the ENQ character is normally used to indicate that a call has con-
nected and that the TPAD terminal may proceed with the transaction. Setting this parameter to
“Off” will prevent the router from transmitting ENQ characters to the TPAD terminal if they
are not required.
Relay ACKs:
Normally, ACK and NAK characters from the DTE are discarded by the unit, i.e. they are not
relayed to the remote host. This parameter may be set to “On” if the remote host requires that
ACK and NAK characters to be relayed by the unit.
EOT only:
A TPAD call is normally terminated with a DLE, EOT sequence. Some terminals only require the
EOT character on its own. This can be configured by setting the EOT only parameter to “On”.
STX to SOH:
Setting this parameter to “On” will cause the unit to convert the leading STX character in a
transac tion into an SOH character.