I'm trying to write a simple OCL OSA application that does a SIGNON and then a MAILBOX READ BY UID in order to retreive all the mailbox profiles on an Octel running release 3.10. And while I can get the call request and call accept to work fine (so the VC is established), nothing I do gets the SIGNON command to work. I've looked at the status log, and the status indicates that it is either my APP ID or my password. It is an OSA app, so the APP ID should be 0xff (255). The password is the same as what is configured under menu 17. I've even tried creating an IVR app with an app ID of "7", so that I could generate the exact signon that is in the documentation - and it too fails in the same way. I've used the X.25 interface monitor to see that the data I'm sending is the data that is being received - byte for byte. My fear is that version 3.10 of the software is incompatible with the OCL documentation I have. Any thoughts?