Router Not Detecting Internet

Hello, 

I am using my router in my office. We have a VOIP system that the internet originally comes through. It then goes through a netgear swtich to our offices. In one of my offices, I have the router connected. I have checked all the switches in the and connections in the back. 

When I test my internet speed it does come back saying there is a 100mb/s upload and download speed (which I am paying for)

However on the app and when I try and use the interenet on my phone or tablets, it says i am not connected to the internet. It also asked me to log into a website when i go. 

for instance went to nypost.com it says

that I have to log in and that my password will be sent unencrypted. 

anybody have experience connecting routers through work systems with a VOIP. The device is an edgewater device. 

thank you