Personally I like parts of the 570 spec - BUT I still use Cat 3 for voice. On the very few occasions when I've done residential I try to run a Cat 3, a Cat 5E and a coax to each of the rooms (except the bathroom - I refuse to put a computer jack in the head.)
I think this business of running Cat 5 for everything is an utter waste of money. Maybe you've got it in stock so it's easier - but go buy a reel of Cat 3 and now it's in stock too.
I've also had contractors try to send me Plenum cable for a job that didn't need it. Their reasoning - that's all we stock so we don't make a mistake. SHMUCKS - go out and look at the job! I can see on a three station candy store it might not matter, but I've run into this on a 3,000 line job!
I've got 41 years in the business and I have never seen a phone that needed more than CAT3. Except VOIP and those aren't phones - they're computers.
Use the right tool for the right job and use the right cable for the right job.
Sam
