E1 Pri Layer 1 status: blue

[steve75]

Hi
i have a customer that have only one E1 PRI.
At this moment, we don't see problem, but when we try a EDT SHOW LINK STATUS PRI we see:

PRI Logical link number: 1
Layer 1 Status:  BLUE
Layer 2 Status:  UP
Interface Activated: TRUE

Can anyone says me, if this information (layer 1 status: Blue) can make a problem?
Standard state of PRI is Layer 1 Status: Green, but at this moment the customer does not report any problem.
It could be a Dual PRI Card? Or, as i think a carrier pbx problem (syncronization ??).

Thanks in advance.
Stefano

[v2win]

What do you get if you do a

DTS READ X LAST 12 (x is the circuit plid)

on that circuit?

[sarond]

I think blue might mean an alarm at the remote end.

[steve75]

Hi, with the command DTS READ X LAST 12 i don't see any error or problem.
In attachment the E1 card view, where I have seen no problems.
The only thing is that the majority of outgoing calls after 20 minutes start to have problems with voice quality.
The voice becomes metallic and highly disturbed to have to tear down the call.
After making hangup of outgoing call, problem is solved, but after 20 minutes still the same.
Any idea? It seems solely related to outgoing calls.
Thanks
Stefano

[x-man]

What netsync are you using? PRI should be synced to the line clock.

[steve75]

Hi x-man, netsync is plid of PRI with 500 slip rate.
Thanks
Stefano

[v2win]

Receive Alarm Indication Signal (Blue)

A receive (Rx) alarm indication signal (AIS) means there is an alarm occurring on the line upstream from the equipment that is connected to the port. The AIS failure is declared when an AIS defect is detected at the input and still exists after the Loss Of Frame failure is declared (caused by the unframed nature of the "all-ones" signal). The AIS failure is cleared when the Loss Of Frame failure is cleared.

[steve75]

Thanks! As i Think it seems a router carrier problem...
Stefano