St 500 sl2100

[Gerrick41910]

Hello. I installed the ST500 on sl2100 .
The cell phones only work on WIFI in the building. Once I turn off the WiFi the app says searching for SIP Server. I tried the port forwarding in the Comcast router

 

[belevedere]

I attached a word document that may help.

 

[Gerrick41910]

Thank you