<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Sep 5, 2013 at 1:02 PM, jg <span dir="ltr"><<a href="mailto:webaccounts@jgoettgens.de" target="_blank">webaccounts@jgoettgens.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">I have 2 ISDN BRI boxes, each with 4 spans, where the first one is configured as CPE, the second one as NET(so I don't need real lines for developing and testing).<br>
<br>
Once in a while I do see the following libpri error messages simultaneously on both boxes:<br>
<br>
PRI Span: 1 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 2 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 2 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 2 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 2 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
...<br>
PRI Span: 4 TEI=0 MDL-ERROR (A): Got supervisory frame with F=1 in state 7(Multi-frame established)<br>
<br>
It does not seem to be a severe error, because everything seems to work. I have not yet figured out how to produce these error messages reliably. They seem to appear after booting both machines before any calls have been made.<br>
<br>
Does anybody know what to do with these messages?<br></blockquote><div><br></div><div>Q.921 just says to log the condition and carry on as if it did not happen. It does not say what to do<br>about it. The condition is likely to happen when the Q.921 peers are out of sync with each other. When<br>
you reboot your machines, they will be out of sync with each other for awhile. I cannot think of a<br>particular sequence of events off-hand where it would happen though.<br><br>Richard<br><br></div></div></div></div>