<DIV> I have seen this issue a lot and it's normally related to media resources. Call setup and call teardown work properly, but the final step of call setup fails. Analyze your call manager trade file to see if the Call Manager is trying to use a transcoding or media termination point resource. </DIV>
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<DIV>Sincerely,</DIV>
<DIV>Dennis Hartmann<BR><BR>----- Original Message -----<BR>From: voip@mrga.ch<BR>Date: Monday, April 23, 2007 9:20 am<BR>Subject: [cisco-voip] VG224 T.38<BR>To: cisco-voip@puck.nether.net<BR><BR>> Hello all<BR>> <BR>> we still have a problem with a VG224 Gateway. We connected it to our<BR>> Callmanager<BR>> 4.2(3) and configured some ports (MGCP). When we want to make a call<BR>> from a<BR>> phone attached to the VG224 the destination phone rings and I <BR>> can pick<BR>> up the<BR>> call. However I don't get a voice connection. The call <BR>> terminates and I<BR>> get the<BR>> busy signal. After that I have to reboot the Port on the VG224.<BR>> <BR>> Has anyone an idea??<BR>> <BR>> Thanks Reto<BR>> <BR>> It seems that the problem is related to T.38 (see packet capture <BR>> below):<BR>> No. Time Source Destination <BR>> Protocol Info<BR>> 34 7.574297 <BR>> MGCP MDCX<BR>> 205 AALN/S2/1@gw MGCP 0.1<BR>> <BR>> Frame 34 (208 bytes on wire, 208 bytes captured)<BR>> Ethernet II, <BR>> Internet Protocol, <BR>> User Datagram Protocol, Src Port: 2427 (2427), Dst Port: 2427 (2427)<BR>> Media Gateway Control Protocol<BR>> MDCX (ModifyConnection)<BR>> Transaction ID: 205<BR>> Endpoint: AALN/S2/1@gw-test-fx1.hel.kko.ch<BR>> Version: MGCP 0.1<BR>> [The response to this request is in frame 36]<BR>> Parameters<BR>> CallId (C): A0000000010000b0000000F5<BR>> ConnectionIdentifier (I): A<BR>> RequestIdentifier (X): 9<BR>> LocalConnectionOptions (L): L: p:20, a:PCMU, s:off, <BR>> t:b8, fxr/fx:t38<BR>> Packetization period (p): 20<BR>> Codecs (a): PCMU<BR>> Silence Suppression (s): off<BR>> Type of Service (r): b8<BR>> Unknown parameter: fxr/fx:t38<BR>> ConnectionMode (M): recvonly<BR>> RequestedEvents (R): L/hu<BR>> QuarantineHandling (Q): process,loop<BR>> <BR>> <BR>> No. Time Source Destination <BR>> Protocol Info<BR>> 36 7.577209 <BR>> MGCP 510 205<BR>> fx: setting cannot be supported<BR>> <BR>> Frame 36 (82 bytes on wire, 82 bytes captured)<BR>> Ethernet II,<BR>> Internet Protocol, <BR>> User Datagram Protocol, Src Port: 2427 (2427), Dst Port: 2427 (2427)<BR>> Media Gateway Control Protocol<BR>> Response Code: The transaction could not be executed, <BR>> because a protocol<BR>> error was detected. (510)<BR>> Transaction ID: 205<BR>> Response String: fx: setting cannot be supported<BR>> [This is a response to a request in frame 34]<BR>> [Time from request: 0.002912000 seconds] <BR>> <BR>> <BR>> <BR>> _______________________________________________<BR>> cisco-voip mailing list<BR>> cisco-voip@puck.nether.net<BR>> https://puck.nether.net/mailman/listinfo/cisco-voip<BR>> </DIV>