We have currently have 8 pstn lines going into a Grandstream 4108. I would like to add one more Grandstream 4108 to add another 8 lines for a total of 16 pstn connections. In testing I can get the second Gateway to receive calls to the correct phone but I can not get the dial plan to call out the correct gateway. I can set it to call out one of the current lines on gateway 1, but it will show the name of whatever port I have it call out, but at least it works. What I need to do is to get it to call out from gateway 2 so I can get it to go out the right port. So i guess the first question is....can you use 2 gateways? I have been searching and haven't found anything on this. I would think that tgis is possible. Hopefully I am missing something simple. Thanks!