Send Break to terminal server

[Avis]

Setup ::

 

PC (cygwin) <-> Terminal Server (InReach) <-> Sun Server (Solaris 8)

 

Scenarios :

Using Tera Term Pro with ssh extension, I connect to the Terminal Server via
ssh and I can use 'Control -> Send Break' to send the break sequence to drop
the Sun Server into its 'ok prompt'.

 

Using ssh via cygwin, I tried to do '~ ctrl-B', but it will not drop to 'ok
prompt'.

 

I tried downloading the source and compiling it on my own, same case, no
luck.  :-(

I read one thread that suggest that it may have something to do with
HAVE_TCSENDBREAK, so I defined it to 0 and recompile.

Still no luck.  :-(

 

Questions : 

Is this a known bug?

Are the workarounds? (other than using Tera Term Pro)

 

Thanks in advanced for any answers.