Hello, I have my 3cx server setup and configured using trial verison right now. Firewall confiured and everything has been working just fine using inphonex voip service. I have a linksys spa921 in my work office and its been working great. I also work from my home office, so I put a cisco spa504g 4 line ip phone at my home office. I set it up just like my linksys phone at the work office. ext 100 and all the same user info. So i have two phones up at the same time on the same extension. Ones local and the other external. Is there any special settings that I need to change to let 3cx know that Im sharing this extension between 2 phones? I just want to make sure I have it setup properly so there are no quirks. Sometimes it seems like my spa504g will ring on two of its lines, even though one call is coming through... Thanks in advance for any help.