Operation Manual

Configuration Interdependencies 205
Unique MSN, EAZ or DDI Required for Each Interface
To ensure that certain NetWare MultiProtocol Router for ISDN 3.0
features work properly in an internetwork, unique MSNs, EAZs (BRI)
or DDIs (BRI, PRI) are required for each interface of an AVM ISDN-
Controller. Consider the following explanations:
Interface Status Time Restrictions
The Interface Status Time Restrictions should always be configured
equally on each interface of an ISDN-Controller if no MSNs, EAZs or
DDIs are used or if the interfaces listen to the same MSN, EAZ or
DDI. Otherwise, the following occurs:
Situation
Router A:
Interface 1: Interface Status disabled due to Time Restrictions
Interface 2: Interface Status enabled
Interface 1 and Interface 2 have no unique MSN, EAZ or DDI or listen to the same MSN, EAZ or DDI.
- Router B calls Router A.
Consequence
Since no unique MSNs, EAZs or DDIs are configured for each of the interfaces, the ISDN-Controller can-
not decide to which interface the incoming call is addressed and tries to pass it on to any interface. If the
call is addressed to interface 1, it will be rejected, because the Interface Status of interface 1 is disabled.
One charge is therefore wasted by Router B. The main purpose of the Interface Status Time Restrictions,
i.e. barring the router completely for incoming calls during certain periods, cannot be fulfilled.
Inbound Call Processing Set Unequally On One ISDN-Controller
Inbound Call Processing should always be configured equally on
each interface of an ISDN-Controller if no unique MSNs, EAZs or
DDIs are used of if the interfaces listen to the same MSN, EAZ or
DDI. Otherwise, the following occurs:
Situation
Router A:
Interface 1: Inbound Call Processing: Disabled
Interface 2: Inbound Call Processing: Enabled
Configur.pm6 27.05.97, 12:33205