User`s guide

257
Entity
Instance
Parameter
Values
Equivalent Web Parameter
snaip x iunsolresp 1 = enabled, 0 = disabled
Ignore unsolicited response
frames
snaip x waitforcontact 1 = enabled, 0 = disabled
Wait for Contact before
progressing to CONNECT
PENDING state
snaip x con_attempts 0 - 2147483647
Make immediate connection
attempts before backing off
snaip x con_boff_time 0 - 2147483647
Backoff for x seconds before
attempting to connect again
Forcing SNAIP to use a specific instance
If several SNAIP instances are sharing an ASY port, a switchover to a specific instance can
be initiated by issuing “snasw x”. Where x is the SNAIP instance number, this instance must
be available to go online or this command will fail.
To revert back and use the default instance, issue the “snadis x” command. Normal
priorities will be used to determine which SNAIP instance gets to use the SYNC port.
Legacy Protocols TPAD
Configuration – Network > Legacy protocol> TPAD
TPAD is a simplified version of the X.25 PAD specification that is commonly used for carrying
out credit-card clearance transactions. Digi units support the use of TPAD over:
ISDN B and D-channels
TCP
UDP
SSL
XoT
Automatic back-up between any two of these “layer 2 interfaces” or “transport protocols” is
supported.
For further information on using TPAD please refer to Digi technical support and ask for a
copy of “TG2 - Introduction to TPAD and X.25”.
Legacy Protocols TPAD n
Configuration – Network > Legacy protocol> TPAD > TPADn
Use TPAD over interface
This section is used to select whether the TPAD instance will use ISDN B-channel X.25,
ISDN D-channel X.25, TCP, VXN or SSL as the transport protocol. For ISDN D-channel
operation, ensure that the “LAPD” option is selected. For ISDN B-channel operation or
operation through a synchronous port, select “LAPB”. In the case of LAPB and LAPD it is also
possible to specify an interface number. This parameter specifies which LAPB or LAPD
instance to use for the relevant TPAD instance. Select “0” or “1” for LAPB or “0” or “1” for
LAPD. When using LAPB with ISDN this parameter may be set to “255”, which means use
any free LAPB instance. This is useful when more than 2 POS terminals are connected to the
router and the acquirer does not support multiple Switched Virtual Circuits (SVCs) on a
single B-Channel. A value of 254 will use an available LAPB instance but will use the same