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Cisco IP Telephony Network Design Guide
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Chapter 5 Dial Plan Architecture and Configuration
Configuring Dial Plan Groups and Calling Restrictions
second calling search space called SJ-Only is created and contains only the
SJ-Users. San Jose staff IP phones are assigned the Unrestricted calling search
space, which means they are allowed to dial anywhere. The lobby phones are
assigned the SJ-Only calling search space, which means they can dial only local
phones within the local site.
The partition and calling search space assignments used to configure the
preceding example are shown in Table 5-1 and Table 5-2. Two partitions define
the reachability characteristics for the given site, one for internal local site users
and one for external calls. Devices and route patterns are placed in these
partitions.
This example represents perhaps the simplest configuration for the requirements
of multisite WAN local call processing. A more ambitious dial plan could include
the following considerations:
• Intrasite calls only
• Intrasite and local emergency calls only
• Intra- and intersite calls only
• Intrasite, intersite, and local emergency calls only
• Intrasite, intersite, local emergency, and local PSTN calls only
Table 5-1 Partition Assignments
Partition Name Designated Devices Assigned to Partition
SJ-Users All IP phones within San Jose
SJ-External All externally destined route patterns (local PSTN)
Table 5-2 Calling Search Space Assignments
Calling Party Search Space Partitions Assigned To
Unrestricted SJ-Users
SJ-External
Devices that can make internal
and external calls
SJ-Only SJ-Users Devices that can make internal
calls only
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