Digi TransPort WR31 User Manual page 604

Configure legacy protocols
X.25 Parameters
Don't switch facilities
If this parameter is set to Off, the packet size and window size are only switched if they need to,
such as if they specify a value different from what is currently being negotiated. If this parameter
is set to On, the facilities are not switched.
Don't strip facilities
When set to On, this parameter stops the X.25 switch from stripping packet size and window size
facilities as it switches an X.25 call. When set to Off, the X.25 switch strips facilities if the
requested facilities match the defined defaults for that interface.
L2 Deactivation Clear Cause
When one side of a switch call fails because layer 2 drops, the other side is usually cleared with a
clear cause 9, out of order. This parameter allows you to set this code to any value.
X25 Version: 84 88
Allows you to switch between X.25 version 88, and X.25 version 84, in which clear causes are
always 0 when issued if the router is the DTE.
Interpret no facilities on Call Accept as P7W2
When this parameter is set to On, the X.25 switch interprets any call accept packets that do not
include the window size (W) or packet size (P) as if the call accept has P7W2, such as a packet
size of 128 bytes and a windows size of 2.
Notes on PAD Answering
Because the other interfaces can operate as normal, even when the switch is operating, take
special care with regard to answering NUAs programmed on active PADs. For example, when a
call is being received on a LAPD or LAPB interface, a PAD instance or remote configuration
session can answer and terminate the call in preference to the call being switched. This means
that the PADs Answering NUA parameters should be left blank to ensure that the router's PADs
are not answering calls that need to be switched. If you do want a PAD instance to answer a call,
program the Answering NUA field with as many digits as you can to ensure it only answers calls
destined for that PAD.
These same precautions apply to the Allow CLI access from X.25 address parameter on the
Configuration > System > General page.
Digi TransPort WR Routers User Guide
Configure Protocol Switch software
604