Jim March
October 4th, 2008, 02:07 AM
I was having trouble with two different cellmodems: my KPC680 (Expresscard) on the Verizon network, and a friend's U680 (USB) on Sprint. These devices aren't at all similar despite sharing "680". Both had connections that would die out after a few minutes. I had tested these under Intrepid Alpha6, and then the KPC680 under Beta1, no change.
I was able to completely fix the KPC680, however I don't have the U680 available for testing. But because the symptoms were the same, I'm guessing the cure was the same...
The fix is to edit /etc/ppp/options:
sudo gedit /etc/ppp/options
...and find the lines for "lcp-echo-failure" and "lcp-echo-interval" and set both to 0. You can see my actual file at:
http://ubuntuforums.org/showpost.php?p=5903831&postcount=9
I also tested this without NM7 (just set it to "network off") and then did a WVdial script as described at that link, so I'm guessing that would work in Hardy. See additional notes at that link.
Other notes: I had tried a Verizon USB720 device under Intrepid Alpha5 and had no problems at all with NM7, so this issue isn't going to affect every cellmodem. This post is provided for anyone having troubles but if you're not, cool.
I was able to completely fix the KPC680, however I don't have the U680 available for testing. But because the symptoms were the same, I'm guessing the cure was the same...
The fix is to edit /etc/ppp/options:
sudo gedit /etc/ppp/options
...and find the lines for "lcp-echo-failure" and "lcp-echo-interval" and set both to 0. You can see my actual file at:
http://ubuntuforums.org/showpost.php?p=5903831&postcount=9
I also tested this without NM7 (just set it to "network off") and then did a WVdial script as described at that link, so I'm guessing that would work in Hardy. See additional notes at that link.
Other notes: I had tried a Verizon USB720 device under Intrepid Alpha5 and had no problems at all with NM7, so this issue isn't going to affect every cellmodem. This post is provided for anyone having troubles but if you're not, cool.