User`s guide

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Ticking this check box will cause the unit to retransmit the APACS 30 string to the terminal
if an error is detected. (e.g. no ACK received from terminal)
STX/ETX removal
Enabling “Del STX&ETX” will cause the unit to strip off the STX and ETX characters that
normally surround the APACS 30 string before sending it to the host. Enabling “Del STX
only” will cause it to strip of the STX character only.
Do not transmit ENQ characters
Under the TPAD protocol the ENQ character is normally used to indicate that a call has
connected and that the TPAD terminal may proceed with the transaction. Enabling this
parameter will prevent the router from transmitting ENQ characters to the TPAD terminal
when a connection is made.
Delay sending ENQ characters to TPAD terminal for x milliseconds when a call has
been connected
This parameter may be used to set the delay in ms from when the router first connects the
call to when it transmits the ENQ to the terminal. By default there is no delay.
Wait for x milliseconds for an ACK before retransmitting the data
This parameter defines the time period the unit will wait for an ACK character to be received
after sending data to the terminal. If an ACK character is not received within this time the
data will be retransmitted. A value of “0” entered here will default to a delay of 1 second.
Transmit TPAD transactions directly in a Synchronous frame
When this check box is ticked TPAD transactions are transmitted without any “outer”
protocol such as X.25, i.e. they are placed directly in a synchronous frame on ISDN. This
sometimes referred to as HDLC by certain card acquirers.
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 enabled the unit will check the
LRC sent by the terminal and if it indicates a problem has occurred NAK the message. If this
parameter is enabled but no LRC is sent by the terminal, the transaction will not be
forwarded to the host.
Include LRC line
This parameter is normally disabled so that any LRCs received from a TPAD terminal will be
removed before the transaction data is transmitted to the remote host. In most cases this is
acceptable because the network will provide error correction and so the LRC is redundant.
In some circumstances it may be necessary to enable this parameter so that the unit
transmits the LRC to the remote host along with the transaction data.
Force parity when sending data to the terminal
When this parameter is enabled 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
without the parity being changed disable this setting.
Strip parity when sending data to the host
Enabling this parameter will cause the unit to remove any parity before sending the data to
the host.
Force parity when sending data to the host
When this parameter is enabled 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 disable this setting.
Strip Trailing Spaces