Small Community Networking
IP Office systems linked by IP trunks can have Small Community Networking (SCN) enabled. Using SCN, the separate IP Office systems 'learn' each other's extension numbers and user names. This allows extension calls between systems and support for a range of internal call features.
IP Office Small Community Networking currently supports a maximum of 500 extensions across up to 16 IP Office systems.
To set up a small community network, the following are required:
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A working IP trunk between the IP Office systems that has been tested for correct voice and data traffic routing.
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For Small Community Networks of more than two IP Office systems, a star network configuration is recommended.
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VCM modules are required in all systems.
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The extension and group numbering on each system must be unique.
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The extension and group names on each system must be unique.
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We also recommend that all names and numbers (groups, line, services, etc) on the separate IP Office systems are kept unique. This will reduce potential maintenance confusion.
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All systems should use the same set of Telephony timers, especially the Default No Answer Time.
Supported Network Layouts
The IP Office systems within a Small Community network should only be connected in a star and or serial layout. For each IP Office there should only be one possible route to any other IP Office even if that route is via intermediate IP Offices. The following are examples.

The use of 'mesh' layouts connections is not supported. That is connections where more there are more than one possible route between any two IP Offices.

Small Community Network Features
The features supported across a Small Community Network are:
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User buttons.
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Camp-on.
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Call Back When Free.
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Paging.
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Call Pick-up.
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Internal Directory.
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Absent Text Message.
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Anti-Tromboning.
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Centralized Voice Mail using Voicemail Pro.
Within a Small Community Network, a single Voicemail Pro can be used to provide voicemail services for all the IP Office systems. For full details of installation and setup refer to the Voicemail Pro documentation. The Voicemail Pro is licensed and hosted by a chosen central IP Office system and provides full operation for that system. Queuing on remote systems is not supported. The voicemail features supported for the other remote IP Offices are:
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Software Level Interoperation
SCN is supported between IP Office systems with the same major software level or one level of difference in major software level. For example between 3.2 and 3.1 (same major level) and between 3.2 and 2.1 (one level of difference).
This option is intended mainly to allow the phased upgrading of sites within a Small Community Network. It is still recommended that all systems within a network are upgraded to the same level where possible. Within a SCN using differing levels of software, network features will be based on the lowest level of software within the network.
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