Digi TransPort WR31 User Manual page 533

Configure legacy protocols
Use 1 socket
When this parameter is set to On, the router uses only one socket for both read and write data.
This is useful if the router is behind a NAT box and incoming connections are not possible. This
parameter can also be set to Compatible, in which mode both sockets are open to start with
and then after a negotiation one of the sockets is dropped.
Include MAC Exclusivity Capability
On or Off. Set this parameter to On to include the MAC exclusivity value in the capabilities
exchange message.
MAC Exclusivity Value
See above.
Ignore unsolicited response frames
When enabled, the router ignores unsolicited response frames.
Wait for Contact before progressing to CONNECT PENDING state
During the DLSw negotiation phase and when XID messages are being exchanged, this
parameter controls which end sends the CONTACT message. Normally this would be off in which
case this router would send the CONTACT message, but if this parameter is set, we would not
send this message, but instead wait for it to be sent to us before progressing in the DLSw state
machine.
Make immediate connection attempts before backing off
The number of successive connection attempts before backing off for the number of seconds
(default 30) defined in the Backoff for x seconds... parameter. This backoff might be necessary
when a server is behind a firewalls that detects too many successive connection attempts in a
certain time frame.
Backoff for x seconds before attempting to connect again
When backing off because of too many failed consecutive connection attempts, this parameter
defines the time, in seconds, the router should remain idle before attempting another
connection.
Digi TransPort WR Routers User Guide
Configure Systems Network Architecture over IP (SNAIP)
533