Digi TransPort WR31 User Manual page 555

Configure legacy protocols
ISDN Parameters
Allow this unit to answer calls
If enabled, this instance of LAPB answers incoming ISDN calls.
Only accept calls from calling number ending with
The filter for the ISDN Multiple Subscriber Numbering facility. It is blank by default. When set to
an appropriate value with Allow this unit to answer calls enabled, the router answers incoming
calls only to ISDN numbers where the trailing digits match the MSN value. For example, setting
the MSN parameter to 123 prevents the router from answering any calls to numbers that do not
end in 123.
Only accept calls with sub-address ending with
The filter for the ISDN sub-addressing facility. It is blank by default but when set to an
appropriate value, with Allow this unit to answer calls enabled, the router answers incoming
ISDN calls only where the trailing digits of the sub address called match the Sub-address value.
For example, setting the Sub-address to 123 prevents the router from answering any calls where
the sub-address called does not end in 123.
Keep ISDN LAPB link activated when user sends a DISC or X.25 PAD session terminated
When this parameter is enabled, the following setting is enabled:
Wait x milliseconds before attempting to establish the LAPB link after B-channel becoming
active
This parameter sets the length of time (in milliseconds), that the LAPB instance will wait from an
ISDN B-channel becoming active before attempting to establish a LAPB connection, such as the
length of time for which the LAPB instance stays passive. The default is 0, as most ISDN networks
allow CPE devices to initiate a LAPB link. If your ISDN network does not permit CPE devices to
initiate the LAPB link you should set this parameter to a value that allows the network sufficient
time to establish the LAPB link.
Use as x a calling party number when making ISDN calls
This is Calling Line Identification. The router will only answer calls from numbers whose trailing
digits match what is entered in this field. The line the router is connected to must have CLI
enabled by the telecoms provider, and the calling number cannot be withheld.
Async Mux 0710 Parameters
Certain W-WAN modules use LAPB to perform multiplexing of serial channels. If using LAPB for
X.25 over ISDN or serial, you can ignore these settings. Do not change these settings unless
under the instruction of Digi Technical Support.
Mux 0710 mode
If enabled, configures the LAPB instance use for multiplexing of serial channels instead of X.25.
Digi TransPort WR Routers User Guide
Configure X.25 parameters
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