2.1.1.4 Multiple Subscriber Number (MSN) Ringing Service
Description
Provides automatic direction of an incoming ISDN-BRI (Basic Rate Interface) line call with an MSN to a
preprogrammed destination. One ISDN-BRI port can support a maximum of 10 MSNs. Each MSN has a
destination for each time mode (day/lunch/break/night).
Point-to-multipoint must be selected for the ISDN configuration.
[Method Flowchart]
CLI works.
Yes
Yes
No
Does the call have its CLI*
information and is CLI mode
enabled for the time mode?
No
Is the CLI destination
assigned?
The call is routed to the
MSN destination.
The call is routed to the
CLI destination.
No
Yes
Yes
Is the MSN found in the
MSN table?
The call is ignored.
Is the MSN destination for
the time mode assigned?
No
*: Calling Line Identification (CLI) Distribution:
If the CLI routing is enabled and the caller's identification number is assigned in the Caller ID
Table, the call will not be routed to the MSN destination, but routed to the CLI destination.
No
Are any MSNs assigned
in the MSN table?
Yes
The call is routed to the
operator (Intercept
Routing—No Destination).
The call is routed to the
operator (Intercept
Routing—No Destination).
A trunk call is received.
[Programming Example of MSN Table for ISDN BRI Port 1]
A table can be programmed for each ISDN
-BRI port. Each BRI port has 10 MSN locations.
® 18.4 PBX Configuration—[10-4] CO & Incoming Call—MSN Table
28 Feature Guide
2.1.1 Incoming Trunk Call Features
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