2.1 Tools -> Setting

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2.2 Setting -> Connection

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2.3 Connection -> SIP settings

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2.4 SIP settings ->Options

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2.5 Options -> Add new SIP profile

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2.6 SIP Profile Page 1

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2.7 SIP Profile Page 2

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2.8 SIP Profile -> Proxy server

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2.9 SIP Profile -> Regist server page 1

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2.10 SIP Profile -> Regist server page 2

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2.11 Click 'Back', wait a few seconds,
It will show 'Registered'

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Change default call type to 'Internet'
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2.12 Settings

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2.13 Settings -> Call

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2.14 Call -> Default call type

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2.15 Change to Internet

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