Dial Plan Considerations - 3Com 3C10402B Administrator's Manual

238 C 10: SIP-M
HAPTER
Dial Plan
Considerations
O
ODE PERATIONS
gateway with three sessions, those three sessions immediately count
against the device limit. You add gateways as Trusted SIP Interfaces.
SIP Mode License Requirements
This section details the licensing requirements for a system running in SIP
mode. You do not need a license to enable SIP mode operation or for
external messaging or conferencing applications.
A 3Com 3108 Wireless Telephone uses a Group 1 license and counts
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as one system device.
Each third-party SIP phone uses one Group 1 license and counts as
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one system device.
Each 3Com telephone uses a Group 1 license and counts as one
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system device.
A third-party PSTN gateway requires one system device license for
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each audio path trusted interface.
SIP gateways, SIP proxies, and third-party SIP applications can be
assigned as trusted interfaces.
At initial configuration, each trusted interface must assign the
maximum number of audio paths that it can have open concurrently.
Each audio path is tracked against the licensed system capacity device
limit of up to 1500 devices. For example, if the trusted interface is
configured for thirty audio paths, the thirty-first request receives a
busy tone or is redirected to another Dial Plan route, if one is
configured and available.
Multi-vendor SIP soft trunks (such as Cisco VIC Cards,
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VCX-to-NBX-to-VCX dial plans, and MCI SIP trunks) require one
system device license for each audio path trusted end point.
The Dial Plan consists of the rules that govern calling behaviors. the NBX
NetSet utility automatically updates your dial plan for most SIP related
changes. However, you must manually update the dial plan if you add a
3Com IP Conferencing Module to the system.
The default dial plan includes an additional default entry, SIP Connection
Ports, in the routing table. A SIP Connection Port identifies the route for a
call going to a SIP gateway or to another trusted device.