Problem

When trying to setup an outbound connection for OFTP over X.25 (ISDN) you encounter the following error in the Trading Engine log:

2014-08-19 16:45:56,068 - [Worker2-10] DEBUG (IsdnIoClientImpl.connectSocket:39) - Attempting to create ISDN outbound connection using settings IsdnIoClientSettings{readTimeout=30000, connectTimeout=30000, isIntegration=false, remoteNumber=031898955, localNumber=0046317095715, x25WindowSize=0, x25PacketSize=0, links=[IsdnLink[host=10.25.13.210, capiPort=2662, controller=1, maxOutCalls=1]], maximumDataSize=99999, bandwidthLimitedTo56k=false, lowestIncomingChannel=-1, highestIncomingChannel=-1, lowestOutgoingChannel=-1, highestOutgoingChannel=-1, lowestTwoWayChannel=-1, highestTwoWayChannel=-1, layer2WindowSize=0, layer3WindowSize=0, layer3PacketSize=0}
2014-08-19 16:45:56,330 - [Worker2-10] WARN  (RegisterAndRelease.release:558) - illegal appId 0 for capi.release
2014-08-19 16:45:56,330 - [Worker2-10] ERROR (TLibSocket.doConnect:97) - TlibException: 5 (Outgoing call rejected.) listen confirm with negative info=8194
                        at de.axway.lib.tlib.capi.TlibCapi.isdnConnect(TlibCapi.java:1067)
                        at de.axway.lib.tlib.isdn.TlibIsdn.tLineConnect(TlibIsdn.java:411)
                        at de.axway.lib.tlib.isdn.TlibIsdn.tConnect(TlibIsdn.java:506)
                        at de.axway.tlib.server.TLibSocket.doConnect(TLibSocket.java:94)
                        at de.axway.tlib.server.TLibSocket.connect(TLibSocket.java:64)
                        at com.axway.transport.ioclients.isdnclient.IsdnIoClientImpl.connectSocket(IsdnIoClientImpl.java:76)
                        at com.axway.transport.ioclients.SocketIoClientImpl.connect(SocketIoClientImpl.java:19)
                        at com.cyclonecommerce.tradingengine.transport.system.production.producers.OftpProducer.produce(OftpProducer.java:109)
                        at com.cyclonecommerce.tradingengine.transport.system.production.ProducerTask.produce(ProducerTask.java:83)
                        at com.cyclonecommerce.tradingengine.transport.system.production.ProducerTask.execute(ProducerTask.java:140)
                        at com.cyclonecommerce.util.task.TaskScheduler$a_.primRun(TaskScheduler$a_.java:16)
                        at com.axway.util.EventedThread.run(EventedThread.java:81)
Caused by: TlibException: 18 (Tlib parameter contains invalid value:) listen confirm with negative info=8194
                        at de.axway.lib.tlib.capi.TlibCapi.sndListenRequestAndWaitForConfirm(TlibCapi.java:898)
                        at de.axway.lib.tlib.capi.TlibCapi.isdnConnect(TlibCapi.java:1009)

                        ... 11 more

2014-08-19 16:45:56,346 - [Worker2-10] ERROR (IsdnIoClientImpl.connectSocket:25) - Couldn't create outbound ISDN connection using link 10.25.13.210, reason: java.io.IOException: Transport library raised an exception
2014-08-19 16:46:01,354 - [Worker2-10] ERROR (ProducerTask.produce:113) - Error producing message ci1408459555842.1808@segot-s253_te<mailto:ci1408459555842.1808@segot-s253_te> ExchangePointId: 356818115 URL: oftpisdn://031898955:0 Name: PDE_ISDN
com.cyclonecommerce.tradingengine.transport.TransportException: java.io.IOException: Unable to create outbound ISDN connection
                        at com.cyclonecommerce.tradingengine.transport.system.production.producers.OftpProducer.produce(OftpProducer.java:28)
                        at com.cyclonecommerce.tradingengine.transport.system.production.ProducerTask.produce(ProducerTask.java:83)
                        at com.cyclonecommerce.tradingengine.transport.system.production.ProducerTask.execute(ProducerTask.java:140)
                        at com.cyclonecommerce.util.task.TaskScheduler$a_.primRun(TaskScheduler$a_.java:16)
                        at com.axway.util.EventedThread.run(EventedThread.java:81)
Caused by: java.io.IOException: Unable to create outbound ISDN connection
                        at com.axway.transport.ioclients.isdnclient.IsdnIoClientImpl.connectSocket(IsdnIoClientImpl.java:33)
                        at com.axway.transport.ioclients.SocketIoClientImpl.connect(SocketIoClientImpl.java:19)
                        at com.cyclonecommerce.tradingengine.transport.system.production.producers.OftpProducer.produce(OftpProducer.java:109)
                        ... 4 more

Resolution

This issue was fixed in Interchange 5.10.0 Service Pack 10 Patch 3.

To validate the changes have been applied, please set the following in conf/log4j.properties file:
log4j.category.com.axway.transport.ioservers.isdnserver.IsdnIoServerImpl=debug
After this, when the TE is restarted just look in the logs for the following record: "MSN (multiple subscriber number) from current server server:".