@Neen
Rather confusing and run on problem description?
Neen wrote
cable modem connected to wifi personal network works router connected to adapter and then a phone.
I'll assume the 'wifi personal network' means modem connected to your router. You have an 'adapter' (PC?) and a phone connected to the router via wifi.
Neen wrote
Phone dial tone but when dialed busy.
Is the phone using Wifi Calling? I assume it is?
Neen wrote
All lights on router orange. Adapter and router were both working but stopped
This appears to be the root problem. When did it 'stop'? What happened at that time?
What debug have you tried?
I suggest contacting Support via the link off the main TP-Link page.