Comm port woes

[Michael L. Hostbaek]

I have a box running 4.8-REL, its primary function is to provide serial
access to cisco routers and switches (for testing purposes).

Since last week no data is coming through, when connected to a device
with minicom or tip(1) - all settings have been verified and double
checked. It is working fine when connected to my FreeBSD laptop.

Is the port physically b0rken, or is it possible to somehow clear the
line ? 

Thanks in advance, 

/mich