... With the IP conversion I have our phones replaced with the IP variant with the Speedphone! It cost me the last nerve - no number assignment is accepted, menus are on the software update constantly different - this is the biggest crap I've owned as part of my long-time home router-phone experience! That's a No! Just the fingers away from it! Too bad that my Airport Extreme no IP phones swallows - otherwise the system would have long since kicked out!