Hi, I'm here again to conclude this post with my opinion about BRIA and its developer Counterpath.
After a while of time spent to find the cause of problem and a potential solution, I found that the problem is between the softphone (Bria or eyeBeam it's the same thing) and any other SIP proxy or SIP PBX (like Asterisk). When we call a wrong number or there a network failure on the SIP Proxy side, it sends a 503 SIP message to the end-point (the caller phone) to indicate a congestion state of service (service is unavailable). The misterious thing is that the softphone, when receives a 503 message, it stop to use the same account to place new calls. So if we have one or more account, but just one is actived, the softphone takes some time to research other way to place the new calls without alternatives and become available only after about 2 minutes. This is really monstrous!
Obviously, for the rest of us the solution is: do not send a 503 sip message to BRIA
I've seen every other sip phones (of any of type: software and hardware) and none of they has this behavior. Only Counterpath's softphone
The last but not the least, Counterpath's support is very poor like the software in this case.
Just for your information, please read this post of three years ago: viewtopic.php?f=1&t=13411