From the Dish setup unfo:
Here is What You Need to Get Started
Sling Adapter only works with ViP? 722 or ViP? 722k HD DuoDVR receivers.
High-Speed Internet Connection (Cable/DSL/Fiber)At least 1.5 Mbps download bandwidth (WAN or LAN)
For DISH Remote Access Mobile App: At least 500 Kbps upload bandwidth
For DISH Online Computer Browser: At least 600 Kbps upload bandwidth
Additional recommendation for optimal viewing:
LAN bandwidth of at least 3.0 Mbps
Note: The faster your Broadband Internet connection, the higher quality your video will be.
This is for the adapter. I don't have the info for the 922 or any other Slingbox.