Sip trunk setup

Hello,

I am trying to configure outbound sip trunk for my server. My provider has only given host for Outgoing Settings and they are saying it is enough to work properly. But i am getting
circuit busy message while making a call and their support says that i am not sending a destination number in my sip invite header. I am not sure how to resolve this issue. Any help is appreciated.

Regards
Spark

Two things:

  1. Whom is the provider ? and
  2. Can you provide (w/o username or password) what they provided you?