OK, this is my first post to this list so please bear with me.  I have 
searched through the mailing list archives (very painful...no search engine)
and FAQ's with no luck.

Here's the question:

Can a Mac IIci /20meg RAM using a 3com ImpactIQ ISDN modem support serial
speeds of 115200?  If so, what do I need to do to make it happen.  Whenever
I tell pppd to use 115200 for the speed, it reports:

Mar 14 13:40:19 macbsd pppd[191]: tcsetattr: Invalid argument

Setting pppd to 57600 doesn't give the error message, but is useless for
dual channel bonding.  What gives?  Am I asking too much.  It would seem
that 115200 shouldn't be out of range as LocalTalk on the MacOS side runs at
double that speed.

Anyway, thanks for any info and advice.