JT>     I have seen the work that you did in Binkley term 
 JT> 2.50 and modelled my
 JT> communications library off the old OS/2 code you wrote

oh no...that original "async.c" is ghastly;  ignore everything in it!

 JT>  First of all when the
 JT> modem is connects my put character function will not 
 JT> work.  The DosWrite call
 JT> returns successfully, but nothing goes to the comm 
 JT> port.

Sounds like a handshaking problem.  What "MODE" settings are you using?

 JT> I hope you can give me
 JT> some advice on these problems.

I'd have to see your code...

--- Maximus/2 2.02p1