How do I setup multiple ATA's to use the engin service behind one NAT firewall?

To setup multiple ATA's to the engin network, you will need to change the SIP and RTP ports incrementally under the SIP and LINE 1 tabs for your Sipura ATA.

For example, if you have 2 x Sipura SPA-2000's, you will need to setup 4 port forwarding rules and also change the SIP and RTP ports respectively for each ATA.  For simplicities sake, we have called the first ATA " SPA Y" and the second ATA " SPA Z" in the following example.


For the first ATA
  1. Set up a port-forwarding rule for UDP 5060-5061 to be forwarded to your "SPA Y" IP address
  2. Set up a port-forwarding rule for UDP 16384 -16386 to be forwarded to your "SPA Y" IP address
For the second ATA
  1. Set up a port-forwarding rule for UDP 5062-5063 to be forwarded to your "SPA Z" IP address
  2. Set up a port-forwarding rule for UDP 16387 -16389 to be forwarded to your "SPA Z" IP address