System dropping continuously

[HFH-Digerati]

I have a 3cx system that has been continuously dropping and coming back since yesterday. I receive DNS/network failure notifications from [email protected] and SIP trunk registration failure email like I do when the site internet goes down, but the internet connection at the site is stable. I have continuous pings running from the site to 8.8.8.8 and a continuous ping to the local IP of the 3cx VM and both are showing 100 percent response and response time of 24ms and <1ms respectively. Does anyone have thought on what might be causing this? Is it upstream with 3cx or SIPtrunk.com?

Thank you

 

[Evolute IT]

What are the DNS servers set on the PBX?