"TRYING" while dailing it says only trying no ring no respon

Hi,

I have softphone connected with asterisk pbx.

When i start the dialing i am getting the message "“TRYING” while dailing it says only trying no ring no responce" like this.

Is it becuase of firewall or voip vender.

Some times i am getting 408 sip message also.

thanks,

criz

From this description it could be anything. Please be more specific and provide an Asterisk-cli output with verbose level 5 for a dialing attempt from the softphone.