Can I add an old DL-604 (4 port router) before my apple airport extreme? I have Fiber Internet so no modem is involved at all. Intenet Wire comes in house as a CAT 5 cable. I want to put the DL-604 just as the fiber comes in my house and then continue out of one port of DL-604 to Apple Airport Extreme. Would this work and/or effect speeds. Currently have 10Mbps up and down.