A reboot of the system after hours appears to have solved the issue.

-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of jg
Sent: Wednesday, February 19, 2014 11:15 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] PRI Error on span 1: Received MDL/TEI management 
message, but configured for mode other than PTMP

Eric!

The pcap trace seems to contain only idle data, and there is nothing unusual.

As far as I know, PRI always uses  the static TEI value of  0, as there is only 
 a single "terminal equipment (TE). The TEI assignment procedure is only 
relevant if there is a BRI connection on a so called "S0 bus" and the TE 
operates in point-to-multipoint mode. Then the automatically assigned TEI is 
within the range 64 to 126. Sangoma ISDN products using DAHDI/libpri do not 
have any problem with this in any mode.

There are always spurious MDL (related  to supervisory frames, or so) messages, 
but they have no impact on actual calls.

If there many calls on ISDN lines and you need to restart 
Asterisk/DAHDI/Wanpipe, then it is likely that the system is in an inconsistent 
state. Some phones ring, but cannot be answered, or answered and the other side 
cannot hear the other side, and stuff like that. I don't see right now how this 
relates to your problem, but you could try to capture the SETUP (followed by 
CALL PROCEEDING, ALERTING, CONNECT, STATUS, ...) messages from in- and outbound 
calls and log what happens.

jg

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