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Deploying the snom ONE IP Telephone System
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Figure 4-7. Line Parameter in 200 Ok of SIP Trace
Figure 4-8. Line Parameter in INVITE of SIP Trace
For gateways and proxies, this method is not possible, so if the
there to give clues on how to route the call, the system must continue searching the
trunk. This is done by a recursive DNS-resolution of the outbound proxy of the trunk.
As the system searches, it uses the priority shown in Figure 4-9.
Note: The domain name
Request-URI. (The Request-URI is a Uniform Resource Identifier that lists the user
or service to which the request is being addressed.) Also, if the
an extension on the system, the trunk identification will be cancelled and the system
will assume that the call is from that extension, regardless of whether the extension is
registered on the perceived IP address or not. The system will then try to authenticate
the extension and determine which IP addresses and ports a trunk may send requests to.
localhost
matches any domain name presented in the
line
parameter isn't
From
header identifies
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