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Deploying the snom ONE IP Telephone System
144
Using a SIP Registrations Trunk (SIP Tie Line)
The SIP registration trunk can be used to connect two branch offices when one of the
offices has a private IP address. For example, a corporate head office has a pubic IP ad-
dress, and a remote branch office has only one public IP address and requires that the
system be on a private address but still wants to have connectivity back to corporate
(Figure 4-18).
Figure 4-18. Connecting Branch Offices Using a SIP Tie Line
1.
Create an extension that will be used by the trunk to route the calls:
5xx
Extensions
Site 1
192.168.1.x
Private IP
Public IP
6xx
Extensions
Site 2
151.196.11.111
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