I just installed an Edgemarc 4700 on one of these circuits and when I got the device online I started pinging to both the public address of the Edgemarc & the ISP Gateway public address. The Edgemarc is in Alabama and I ran pings from my office in Philadelphia. The Gateway did not drop any packets but the Edgemarc did. Immediately I began to troubleshoot the Edgemarc since it was dropping a ton of packets. I was able to ssh into the Edgemarc and ran pings to 8.8.8.8, CNN.com and the Public Gateway address (modem). All these pings dropped a ton of packets. The at&t modem has a LAN gateway of 192.168.50.1 which I verified the MAC address in the Edgemarc arp table that it actually is the modem. When I ping it from the Edgemarc I don't drop any packets which makes me think that it is an ISP problem since there is no packet loss on any LAN IP's. I also had the installer test the cable between the Edgemarc and the modem and it passed. I ran also ran a Capture on the WAN port while I pinged external addresses from the Edgemarc and ping from Philadelphia. On the pcap I saw a few "no replies" but none to the public address of the Edgemarc. Is this conclusive evidence that the ISP is to blame?