Creation of Calling Restrictions and
Configuration of Dial Plan Groups
.. Within Cisco CallManager, you can create calling restrictions per each
telephony device, or create closed dial plan groups (as long as they fall
within the same Cisco CallManager).What this means is that users
residing within the same Cisco CallManager can be grouped together
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328 Chapter 9 • AVVID Dial Plans
with the same calling restrictions and dial plans. For example if you have
development teams that need to talk to only each other, you can restrict
their dial plans to within the group, or limit their ability to call long
distance.
.. A partition is a group of telephony devices that have similar reach ability.
These devices are composed of route patterns, IP SoftPhones, directory
numbers, and so on.
.. A calling search space is a list of partitions that can be accessed by users
in order to place a call.These calling search spaces are only allocated to
telephony devices that can start calls.With these calling search spaces
implemented, it is simple to create and use dialing restrictions, because
users are only allowed to dial those partitions in the calling search space
they are assigned to. If the user tries to call outside the allowed
partitions, they will receive a busy signal.
.. The combination of partitions and calling search spaces can allow
autonomous dial ranges on a partition basis. Extension and access codes
located within different partitions can have overlapping number
schemes, and will still work independently of each other.This is usually
seen in the implementation of a centralized call processing system. In
this example, all sites that use the same Cisco CallManager can dial the
number 9 to access the PSTN, even if they are located on different
WAN segments.