I am trying to pass call via sip phone and I was success when I tried for the first time but after that I can’t connect the call showing the message below. Can any one give me a solution why this happening, if the configuration is not ok then how I could successfully call for the 1st time. If so then what is the problem?
My configuration is below
You dialed extension 10001, but it is engaged (busy). Hang up that phone and try again.
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.