Syntax in Setserial

[Coopers]

Hello All
I am attempting to finish setting up my modem, and even though my
box "see's" ttyS2 on boot (o.k., enabled), I still can't fire it up. I
think I've got isapnp.conf figured out (maybe) ;).
Further on in the loggin script, I see that ttyS2's uart value is set to
8250.
Would someone be kind enough to show me in example the syntax to
change my uart setting to 16550 (with setserial, term, or whatever)?
Thank You
Bill
p.s.
I hope my next e-mail will be my first on my new Linux box...