Digi TransPort WR31 User Manual page 554

Configure legacy protocols
RR Timer x milliseconds
A standard LAPB Receiver Ready timer. The default value is 10,000 milliseconds (10 seconds)
and it should not normally be necessary to change this.
T1 Timer x milliseconds
A standard LAPB timer. The default value is 1000 milliseconds (1 second) and under normal
circumstances, it should not be necessary to change it.
T200 Timer x milliseconds
The standard LAPB re-transmit timer. The default value is 1000 milliseconds (1 second) and
under normal circumstances, it should not be necessary to change it.
X.25 Window Size
The X.25 window size. The value range is from 1 to 7 with the default being 7.
Disconnect link if there has been no X.25 activity for x seconds
The length of time, in seconds, before the link is disconnected if there has been no X.25 activity.
If this parameter is 0 or not specified, then the inactivity timer is disabled.
Disconnect link if there has been no activity for x seconds
The length of time, in seconds, before the link is disconnected if there has been no activity. If this
parameter is 0 or not specified, then the inactivity timer is disabled. It is useful to set this to a
short period of time, for example, 120 seconds, when using a LAPB instance over ISDN; for
example, with TPAD. Should the POS device fail to instruct TPAD to hang up you can use this
timer as a backup hang-up timer thus saving ISDN call charges. When using LAPB on a
synchronous port, set this parameter to 0.
Send X.25 Restart packet on receipt of SABM frame
This parameter can be set to No or Immediate.
When set to Immediate, the LAPB instance sends an X.25 restart packet immediately on
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receipt of an SABM (Set Asynchronous Balanced Mode) frame.
If the parameter is set to No, no X.25 restart is sent.
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Digi TransPort WR Routers User Guide
Configure X.25 parameters
554