SIP

Configuring SIP OPTIONS for NAT Transversal

Asterisk VoIP / August 2, 2026

When running a FreePBX server behind a NAT firewall, your router or firewall may aggressively close idle UDP or TCP connections to your SIP provider (such as Twilio) if there

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Enable Video Support

Asterisk VoIP / March 16, 2008

I downloaded the X-Ten softphone and was suprised to find out that the video call did not work. When trying to enable the video it would turn on the “Sending

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