Glad to hear the 502's are behaving. I had to retire my PAP2T about 10 mos. ago and go back to the 502 due to service issues. One of the neat things of the 502 is the ability to change to an alternate server if no response is received from the primary. I noticed that sometime today my ATA switched my line 1 from the Chicago server to Central. Ever since they fixed the firmware it's been a very stable device.