Your computer couldn't call our location on the standard SIP port (5060). Generally, one of the following environmental issues causes this failure:
If you have a VoIP Service, your VoIP/Phone Adaptor may have reserved the standard SIP port and is filtering out our SIP packets. Consider temporarily removing the Adaptor from your configuration and re-running the test.
Your Personal Firewall, if you are using Windows XP, may be filtering the SIP and UDP ports used for communication.
Either your home firewall or your broadband provider's firewall may be blocking the SIP and UDP ports used for communication.
Please check these firewall settings and ensure that UDP ports 5060 and 50000 - 50100 are open for RTP streams and SIP signaling. Then re-run your test.
How can I open the ports?