I have two SIP accounts registered at the same time. One is my personal asterisk server, the other is a free inbound CallCentric account. When I only have my SIP account setup/registered, I can place calls (dial) from Zoiper just fine. But when I add the CallCentric account and I try to dial, it tells me it can't place the call.
How can I tell Zoiper which SIP account to dial out from, so it will dial from my server, not the CallCentric account? I think that is the issue.