On the IP address, i'm really not sure. but i know you do need at least 25mps.
That sounds really high. Typical usage is 100 Kbps per phone. For 10 phones, you would need about 1 Mbps. Good QoS on your router/switch helps quite a bit.
Yeah, kinda what I said, lol. Left off the QoS on purpose, though.
