Hi, our serial interface recently went down and I'm trying to figure out why but I'm not sure what the lights on the card mean. The lights on the card are LP, AL, CD. The LP light is blank, the AL light is orange, and the CD light is green, but both the interface and line protocol are down. How can I tell if the card itself is bad or if it's something else like possibly a bad cable? The "no shutdown" command does not bring the link back up. Thanks.
I have this problem too.