Cannot make calls from one extension to another

I have not changed anything in my settings, but suddenly I cannot make calls between extensions. It shows that the calls are being made, but there is no ring and the call is just disconnected. The call monitor shows the call being made. It says hangup, and shows the duration of the call as 0.00. I don't know what to do to solve this problem because I didn't change anything to create the problem.

RE: Cannot make calls from one extension to another

Because you are on the free account there is no logfile. Please upgrade to a Soho account for a month to be able to assist you.

RE: Cannot make calls from one extension to another

Thank you for responding to my question. I was able to get it working again on my own. I'm not exactly sure how I fixed it, but I did the following:
1. Turned off my internet and turned it back on again.
2. Reset my PBXES.
3. Reset my VOIP adapter.

Thanks again!