Configuration

You can use a SIP trunk to connect an external PBX to the outside world through the platform.

Router/Firewall configuration

• Ask the person who manages your router/firewall to allow outgoing traffic to the IP range. You’ll find the list of IPs in your admin portal, in “Config” > “Advanced” > “Account details” > “Infrastructure” tab.
• If the router/firewall supports QoS (Quality of Service), assign a higher priority to the trafic exchanged with our IP range.
• Some routers also include a feature called SIP ALG (http://en.wikipedia.org/wiki/Application-level_gateway). Our experience shows that SIP ALG is often poorly implemented on low-cost routers and that it is better to disable SIP ALG.
• Make sure that the default NAT session timeout is > 30 seconds.