Good question! I have the same problem when I try to use Central. Even though I am already on the network.The app is a big Fail, IMHO. So many things Arris should have fixed in Beta before rolling out the worthless app.

Does anyone have a solution to my connectivity issue so I can run a speed test?

Have you simple tried using the speedtest app? 

Or having a hardwired in pc/laptop and testing the speeds that route? 

I’m not a huge fan of built in speedtests as they aren’t always accurate

Yes, the picture I sent is of the app. Im wanting to test iPhone to modem to internet speeds, so I didn’t use a laptop. I ran this test before when I first purchased the modem so I know it possible to use this configuration. 

Looks like its not currently working according to the mod’s. 

This issue isn’t the modem, the modem and router are operating fine. The issue is I get the message that access to the network as unavailable. How do I get access to them at work?

Can anyone help with this issue?

Did you click on the link I posted? it says its not currently working and is posted by a moderator. 

Update: Speed Test Service | Community (surfboard.com)

This link