What type of communication security is being used? Upgrading to 7.4 automatically disables some TLS and SSL protocols. This may help:https://www.ibm.com/support/pages/configuring-your-ibm-i-system-secure-sockets-layer-ssltransport-la...
Having recently commenced setting up a new iSeries partition, upgraded from v7r2 to v7r4 and no longer having an internal modem card we've downloaded and applied the current ptf's to provide 5798FAX IBM Facsimile Support for i to the system allowing for an async line to be defined that will use an ETHDEVSVR. In this case we are attempting to use either a Digi PortServer TS 3 with it's integrated modem, or a Digi PortServer TS 4 with an external modem.
The line will vary on and go to connect pending, however with test faxes submitted to the queue the moment we start fax services with enhanced pointing to the fax device description we will receive CPDB232 with reason code E4100003 An error occurred when connecting to the Ethernet device server......which of course explains nothing. The line will then go to rcypnd and we try again.
The digi's are set to TCP Sockets on the TS4 and Custom Profile with similar values on the TS3. They are not prompting for login and as we are not using cat5 cable we do not have Force DCD although we've tried that scenario to see if we'd have any luck. Have also experimented with lowering the baud rate to 14400, granted we're not getting that far in the process.
We can successfully telnet to the port on either and issuing an AT will get an Ok response.
I can certainly post screen shots of the LIND however I'm hoping someone will just say there is an additional PTF I've missed when trying this since IBM's very basic document reports the TS 4 is a supported device. Unfortunately we cannot just change the programs yet that still make use of faxing to just point to an e-fax solution.
Thank you for taking the time to read, looking forward to suggestions or leads to a solution.