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Short Version:<br>
Your provider has made changes.<br>
<br>
Long Version:<br>
CM sends out CONNECT with DisplayIE. Your provider's switch does not
like the DisplayIE so they send back a status message. The status
message says callstate state=0x04. When CM receives this message it
has already proceeded to the connected state. CM detects this as a
state mismatch and clears the call. <memoryfade> I believe it
is DMS protocols which do not like the DisplayIE</memoryfade>.
We are attempting to 'fix' this scenario, but our 'fix' actually makes
us non-compliant with ISDN protocols by strict interpretation. See
CSCeg56289.<br>
<br>
Possible fixes short of upgrade to the newest fix:<br>
1) uncheck 'display ie delivery' on the gateway config page in CM<br>
2) change ISDN switch types. Also have your telco change the
switchtype configured on their d-channel.<br>
<br>
/Wes<br>
<br>
Ed Leatherman wrote:
<blockquote
cite="mid:94a1afde0802220610l58aff571v748c0d4e148119a1@mail.gmail.com"
type="cite">Hoping a resident gateway guru can take a peek at this, to
see if i'm barking up the wrong tree here<br>
<br>
We have a remote office with a legacy PBX of some sort which we have
interfaced with our call manager 5.1.3 system via a PRI to a 2811
router (MGCP controlled). Has been working fine for about a year, but
the past few days they are no longer able to call IP Phones on our
network.. but they can make calls out of our PSTN gateways here on the
main campus. Basically they call an IP Phone, it rings here but then
has reorder tone. Calls setup and complete fine in the other direction,
it's only calls from the remote site to main campus IP phones that
cannot connect.<br>
<br>
I'm trying to get their telecom partner to take a look at their switch
as well to see if anything changed, but trying to do my own
troubleshooting in the meantime.<br>
<br>
I'm poking around at the trace files, <br>
>From the call manager point of view, everything appears to work
fine in the ISDN/MGCP call setup from what I understand, up until the
CONNECT portion; I send CONNECT message to the remote switch, and get a
STATUS message back with an error about IE not implemented, which is
then followed up by a DISCONNECT from call manager. Right after I send
the DISCONNECT I get the CONNECT_ACK that I was supposed to get from
the initial CONNECT message. Then the call tears down normally.<br>
<br>
>From the IP Phone side, the media stream opens and then closes
immediately according to the trace file.<br>
<br>
My question is, is the status message coming in before the
connection_ack what is causing call manager to drop the call? <br>
Newbie question, can I just uncheck "Display IE Delivery" in CCM to get
rid of that error?<br>
<br>
OUT:<br>
CONNECT, pd = 8, callref = 0x8001<br>
Display i = 'Ed Leatherman'<br>
<br>
IN:<br>
STATUS, pd = 8, callref = 0x0001<br>
Cause i = 0x81E3 - IE Not implemented<br>
Call State i = 0x04 - Call delivered, ITU-T standard<br>
<br>
OUT (MGCP):<br>
MGCP Version 0.1<br>
<a moz-do-not-send="true"
href="mailto:S0/SU0/DS1-0/23@HSC-East-VGW-1.nsog.wvu.edu">S0/SU0/DS1-0/23@HSC-East-VGW-1.nsog.wvu.edu</a><br>
Sequence 792352<br>
NotificationRequest (RQNT)<br>
RequestIdentifier(X): 17<br>
RequestedEvents(R): D/[0-9ABCD*#]<br>
SignalRequests(S)<br>
QuarantineHandling(Q): process,loop<br>
<br clear="all">
OUT (ISDN):<br>
DISCONNECT, pd = 8, callref = 0x8001<br>
Cause i = 0x80E5 - Message not compatible with call state or protocol
error threshold exceeded <br>
<br>
IN (ISDN):<br>
CONNECT_ACK, pd = 8, callref = 0x0001<br>
<br>
<br>
-- <br>
Ed Leatherman<br>
Senior Voice Engineer<br>
West Virginia University<br>
Telecommunications and Network Operations
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