Digi TransPort WR11 User Manual page 275

Configuring network interfaces
Cause a protocol instance not to answer an incoming ISDN call (if the trailing digits of the ISDN
n
number called do not match the entry in this field).
Increase the answering priority of an instance (if more than one protocol instance is configured
n
to answer and the trailing digits of the ISDN number called match the value of the MSN
parameter for a particular protocol instance).
Example
Consider the following:
An Adapt instance is bound to a serial port and ATS0 for that serial port is set to 1.
n
PPP instance 0 has answering turned On.
n
The ISDN line to which the router is connected has two numbers: the main number is 123456
n
and the MSN number is 123789.
Normally, because ADAPT has a higher answering priority than PPP, the Adapt instance will answer
when either of the numbers are called. However if the ISDN number dialed is 123456 and 456 is
entered into the MSN parameter of PPP, PPP will answer instead. This will also have the effect of
preventing PPP from answering if any other ISDN number (such as 123457) has been called.
This means that whenever 123456 is called the PPP instance will answer, and whenever 123789 is
called, the V120 instance will answer.
You can connect multiple ISDN devices to the same ISDN line. Then, you can use MSNs to allow the
different ISDN devices to be dialed individually (such as dial the main ISDN number), and get through
to ISDN device one, dial the first MSN and get through to ISDN device number two, dial the second
MSN, and get through to ISDN device number three, etc.).
Multiple PPP Instances
It is also possible to configure multiple instances of a particular entity to answer. For example, PPP
instance, 0, 1 and 4 could be configured to answer. In this case, provided none of the PPP instances
are busy, the PPP instance with the highest number will answer first. You can use MSNs to ensure
that a chosen PPP instance answers the call.
The multiple protocol entity answering instance rules are as follows:
Adapt
The lowest free Adapt instance with auto-answering enabled will answer first.
PPP
The lowest free PPP instance with answering on will answer first.
LAPB
The lowest free LAPB instance with answering on will answer first.
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Web
1. Go to Configuration > Network > Interfaces > ISDNThe ISDN Answering. This page is for
configuring the ISDN interface to receive incoming calls.
2. Configure the ISDN answering parameters:
Digi TransPort® Routers User Guide
Configure ISDN interfaces
275