I am having a problem on three incoming CT1's that are terminated by the T1 card to quad modems. We are seeing "bipolar violations", "code violation errors", and "bursty errored seconds". The telco has looked into the hdsl carrier and it shows no errors. Neither does the central switch. They put a tcomm tester on the T1 to watch the data and it reported "secondary channel loss", but they are unable to determine what that means in the context of a T1. I began looking for problems when the number of people complaining about not being able to stay online jumped significantly today. They report the problem has been going on for the past two days. Does anyone have any thoughts on what these errors point to? The telco is going to replace cards in the central switch this weekend, and I'm considering resetting the T1 cards to see of that is it. I appreciate any help you can give. Mark Thornton San Marcos Internet, Inc. 512-393-5300 - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.