ISDN Se0/0/0:23 Q931: Ux_DLRelInd: DL_REL_IND received from L2

MMstre · ‎01-08-2009

I had a customer that had an outage and need to find out why. Debugging q921 yields one way SABME. I know what this may indicate, but the error that I cannot decipher is

"ISDN Se0/0/0:23 Q931: Ux_DLRelInd: DL_REL_IND received from L2"

Anyone know what this means???

smalkeric · ‎01-18-2009

You may try replacing the router and check the connection again.If the problem is not with the router check the PBX connection.

MMstre · ‎01-18-2009

Interestingly, I think this was a provider issue, what exactly happened I have no idea. I showed up at the customer site and everything was working. Of caurse, the provider had no idea what went wrong nor what the fix was... Thanks for the response.

l-mathews · ‎11-01-2015

What does the above q921 message mean?. For that matter what does SABME mean?

Not strong with voice. Let me know, Thanks

Carlo Poggiarelli · ‎11-01-2015

Hi.

Set Asynchronous Balanced Mode Extended (SABME)

SABME is the first message sent during a Layer 2 connection sequence. Its basic purpose is to reset the link and prepare it for a new connection. SABMEs must be acknowledged by a UA.

HTH

Regards

Carlo

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Todd Machado · ‎10-10-2019

We had the same problem, ended up being a Telco issue, when the d channel came up so did the circuit.