The 811 does respond to IR commands. Others on this forum were using Dish 6000 remote codes to control the 811; do a search at www.remotecentral.com for Dish 6000 codes to download to your MX500.
In my case, I have an 811 that replaced a 4900. Since the 4900 codes control the 811, I just programmed my JP1 remote (Radio Shack 15-2116; IR only) with the 4900 codes.
In my case, I have an 811 that replaced a 4900. Since the 4900 codes control the 811, I just programmed my JP1 remote (Radio Shack 15-2116; IR only) with the 4900 codes.