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Line 20:
* [https://www.digium.com Digium official web site]
* [https://www.digium.com Digium official web site]
* [https://en.wikipedia.org/wiki/Voice_over_IP VoIP related Wikipedia page]
* [https://en.wikipedia.org/wiki/Voice_over_IP VoIP related Wikipedia page]
−
−
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{{footer_en | link_page=voip_introduzione}}
{{footer_en | link_page=voip_introduzione}}