
18 Fundamentals
Nortel Business Communications Manager 5.0
Configuration — System
NN40170-501 02.04 Standard
September 2009
Copyright © 2009, Nortel Networks
Once a target line is configured with public or private numbers, deconfiguring
DNs that have appearances of those target lines does not remove the public
or private numbers from those target lines.
The DNs assigned to IP sets or applications do not need to be consecutive. If
the relevant pool DNs are renumbered or changed, so the consecutive DNs
do not exist, then the IP sets or applications have non-consecutive DNs. For
this reason the low and high values for IP sets and applications represent the
lowest and highest DN value currently in the respective assigned range. The
total number of DNs assigned is not all the DN values in between the low and
high values.
Configuring IP or Application DNs is a cumulative action. Every new
successful configuration request adds the relevant count of IP or Application
DNs to the existing range. Existing DNs are not affected or changed in any
way. The default number of DNs to add is normally zero. This is a protection
mechanism. You must change the number of DNs in the Number of DNs to
add field to the desired number of additional DNs.
When you configure DNs there is an exception to the number of DNs you can
add. The BCM 5.0 system requires a minimum of three configured application
DNs for applications to function correctly. When you configure application
DNs, if there are fewer than three currently configured application DNs, then
the minimum number possible to configure is set so that the final configured
application DN count is at least three. For example, if through Set-based
administration you complete a DN deconfiguration, and only two configured
application DN remains, then the next time you configure application DNs the
system would permit a minimum of two additional DNs to be configured for a
final total of three.
Finally, you can partially configure IP sets and applications (but not MBMs)
with fewer DNs than the licensed device count. The MBM needs to either read
MBM DNs or Digital/Analog station DNs. If there are not sufficient DNs defined
in the relevant pools then the number of available DNs are allocated to the
services list.
Main unit and expansion unit MBM configuration on BCM450
Attention: Main unit and expansion unit MBM configuration is applicable
only for BCM450
During media bay module (MBM) configuration, the BCM450 system provides
suggested default values for the MBM. These suggestions include DNs or line
numbers. If you change configuring data from the defaults provided and the
configuration fails, then the configuration reverts back to the suggested
values.
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