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Give the Line an unique name, insert the Registration user name and Password, as well as other parameters like the Registrar server and the base number.

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Just add the telephone numbers for this SIP trunk in the "Advanced Settings" and click "OK".

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After some seconds the SIP trunk will be registered:

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VoIP Settings:

To complete the configuration, go to "VoIP - Settings" and edit the SIP Trunk.

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Here you have to define other settings, for instance how the outgoing lines have to look like (e.g. Clip no Screening):

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VoIP Menu Advanced settings:

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