right - look in /usr/X11R6/lib/X11/fonts/encodings
ibm-cp437.enc.gz etc.
Unfortunately that doesn't work :/
The "10x20" xterm console font seems to understand linedraw characters without further muckage. So
xterm -fn 10x20
Also simply appending -u8 (make the xterm understand Unicode-8) seems to work with any font having linedraw characters - e.g. Andale Mono, Lucida Console, Courier New..so use the "-fa" option for a TT font and do
xterm -fa "Andale Mono" -fs 12 -u8
-fs is font size in points, of course.
You need X > 4.2 to get an xterm that understands Xft. A modern Red Hat probably has it.
As for console fonts - I use the Neomagic framebuffer device on my laptop and have the sun12x22 console font compiled into the fbcon module. This has line draw capability under ISO-8859-1 without munging anything. The standard VGA font should as well.
-drl