After receiving the APN, password, info from John I bought another zoom and tried it. But evidently my local at&t server uses different info. I called Zoom tech support and the technician gave me about 5 more sets of APNs, Dial ups, Passwords Etc for at&t but none of them worked. I could access the internet via the laptop thru the zoom, but at&t must have the ports blocked. As for the CTR500 router, it appears to assign an IP to the ATT stick, but it never connects to the internet. Now I have a Sprint U250 and will try another router monday.
There is a tech named Vic at the 3Gstore who is working with me on this. He has set up hundreds of remote cameras, alarms etc, and will send another router that they have had
good luck with. As for the Sprint U250, it has a static IP, and should work eventually. What a mess, will be glad to see it work.
Tom K5AX