Did Avaya make a 4424 or 4412 IP phone? I tried looking it up but got no clear answers. If so, will they work on release 9? I got a blind CEO that wants to keep his old Legend phone which isn't compatible, the 4424 is close. We could go digital, but they only work on DS16 or DS30 expansion modules which would be expensive for just one digital phone. All other phones would be IP.