Hi,
I am an Asterisk Engineer with Strong Working Knowledge. I have experience of configuring systems like this.
I can configure your fonebridge device. If interested feel free to contact.
I am 15 years experienced senior software developer. I have mostly worked on the VOIP projects. i have designed hybrid VOIP PBX. I have used Asterisk, i have written modules for it and configured.
I used b2bua at the past and i used opensips too.