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To establish a SIP call through the

Spacevars
0series4
, an IP Plan (Creating an IP Plan, Creating IP Plan for SBC SWe) must be developed and the following network elements must be installed and interconnected:

  • Spacevars
    0product
    server(s)
  • Far End A (must know the IP address of
    Spacevars
    0product
    's SIP port)
  • Far End B (must know the IP address of
    Spacevars
    0product
    's SIP port)
  • Associated routers
Info

For basic configuration details, see:

Configure SIP Trunking

In this scenario, trunk group routing is used to send all traffic arriving on "Outside" trunk to "Inside" trunk, and vice versa. This allows for no additional configuration changes on the SBC as the operator adds more numbers to be routed.

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Warning
When a SIP Port is created (IP address is assigned), the system also creates an ACL allowing traffic from all source IP addresses to that destination. In other words, an unauthorized entity could attempt to send traffic to the IP address of the SIP Port. To prevent unwanted registration or call attempts at the earliest opportunity within the SBC, manually create ACLs to specify what source IP addresses are allowed toward that SIP Port. Refer to the topic Managing SBC System Security for details.

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