What you need is a patched waitcall. I made this waitcall for bbs 5.0b years ago. Is there any chance that will work with your version of BBS Express?
The ENTER thing "s*cks" bigtime. In my patched waitcall it goes to the CONNECT fase right away as soon as a connection is made. The only important thing is that the emulator returns SOMETHING to the waitcall. Just one byte is enough. So what responds the emulator to Bobterm as soon as you connect to that?
I mean: sysop Abdul... start bobterm, and try to connect from a PC to your Bobterm. What is the message you get on the bobterm screen? Is that RING or something?
I could check the waitcall code again. Another thing you can do:
Send me your waitcall.cmd ... I'll take a look at it, and fix the code if you like.
Do you have a WAITCALL.CMD that works on a UDS-10?
I have 4.0B.