I run ppp on an EVDO wireless card.  The PCMCIA card itself appears as
ucom0 on umodem0 on a USB hub at cardbus0.  The problem is that it isn't
as fast as it should be.

I've run the same web-based speed testers when running both NetBSD and
Windows.  On NetBSD, I never see more than 220K bps; on Windows, I can get
650K-850K bps.  The question is what I should change.  MTU is 1500; I see
nothing else obvious.

		--Steven M. Bellovin, http://www.cs.columbia.edu/~smb