I have a new client with a hacked together network. They run a SMS gateway and a dlink wireless router. They also need a small (4 port) switch to handle all the network connections. I am having a horrible time trying to work with the SMS gateway and the DLINK router. I figured I could just run a cable from the SMS to the DLINK and plug my switch into the DLINK router. Anytime I would plug the switch into the router, it would take the router connection offline to the SMS gateway. This client also have 3 different vonage phone phones I need to wire in. I know the fact that the gateway and router are both trying to handle DHCP is tripping me up, however; I'm not sure how this thing needs to be wired and what I need to do to the DLINK wireless router to make it work with the SMS gateway AND my small unmanaged switch. Can anyone provide me some insight?