Keep Getting Server Down Message

[angel3]

I just registered for a Dellvoice softphone and when I tested the connection, the message stated that the server is down. I am able to call from the softphone, but would get no sound. However, I am unable to do the reverse, i.e. to connect to the softphone.

I just installed Bell Fibe, and was supplied with an Internet Hub for a dry loop connection. I do not know what configurations I need to make, as I had also had a wired connection. The manual I was given only provides for safety, warranty and installation only. So if some one can help me to make the appropriate adjustments or fixes, much would be appreciated. Sorry, but I do not know much about these technical stuff.

Thanks in advance.