[Asterisk-Users] Problem connecting a TE410P to an E1/IP equipment

[Kevin P. Fleming]

Johan Bilien wrote:

> But why would I only have a LOF error on one side?

Clocking issues, probably. You have a mismatch in clock source, framing 
types or the like somewhere :-(

> What does the Down mean here? Is it an administrative down state, or one
> that comes from the alarms?

Yes, "Down" here means the span is down, Asterisk is not able to 
communicate over the D-channel to the other end to bring the span up. 
You will see this even if the link is running perfectly, if the other 
end has been forced "down" (which is common with telcos when a new 
circuit is brought up).