SmartSDR - Minimum Link Speed

I’m having trouble with remote access using SmartSDR.  My station is a 6600M, a Dell laptop, and I use Xfinity for internet access at the station (at home).  Pretty basic - no fancy switching, hubs, routers,etc - fer now!  I have connected using outside WiFi or cell networks with no trouble, meaning the access will work.

Recently I was stuck using a Guest WiFi network at a hospital for a couple weeks.  Of course I want (need) to connect to my station at home from the hospital.  Everytime I do, I get a partial connection: SmartSDR will test OK but never displays any part of the Flex waterfall or radio settings - regardless of the remote device (PC or IOS device).  Even DAX and CAT show trouble.

I just tested the internet access thru this Guest WiFi network (when it will connect and test) and found it to be 1.2 mb down and 200 kb up.  Pretty bad - huh?!

That got me thinking: 

• What is the recommended speed for remote access and SmartSDR?  
• What should the minimum down/up speed be for a successful connection?  (….of course faster is better….)
• Can they be blocking access using SmartSDR - even tho it tests OK?

I’m interested in your experiences and what speed you have used.

Thanks in Advance for any and all comments and direction…..

KF6JS - Tony