Outbound Calls Busy through 3CX Session Border Controller

Mark Berry July 26, 2016

I am running 3CX 14 stand-alone on a cloud-based server with a fixed IP.

At my location, I have installed the Session Border Controller (SBC), also v14, on a local server.

When I dial out from a local phone, sometimes I just get a busy signal, even if I am dialing ext. 99 for voicemail. Running a trace on the phone, I see it is receiving a 403 Forbidden error.

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3CX Custom Provisioning Templates

Mark Berry June 6, 2016

If you want to provision unsupported phones to use with 3CX, you may come across this article on the 3CX web site:  Provisioning unsupported IP phones. It looks quite helpful but it’s out of date in an important area:  the location of the templates.

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Setting Up QoS for 3CX under Windows 7

Mark Berry June 2, 2011

As mentioned in the previous post, getting endpoints to apply QoS tagging is only half the battle. We also need the PBX to apply tagging on outbound packets.

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