silo overflow

[mindfsck@t-online.de (Florian Zimmermann)]

Hi there,

i got this annoying messages while i send data
via the serial port, the data is transmitted
in a say...fucking slow way as well from the first
occurence of the message at least.

i google'd for this problem, and this message seems
to have a long tradition ;-) some mails date back
till 1990 (from sunOS).
Most it's said, the machine is too busy to serve
the serial port, but that's not the case here ;((

i'll show you the interesting parts of my config
and hope someone can help!!

thank you,
flo

dmesg:

OpenBSD 2.9 (GENERIC) #653: Sat Apr 28 13:57:59 MDT 2001
    deraadt@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: F00F bug workaround installed
cpu0: Intel Pentium/MMX ("GenuineIntel" 586-class) 133 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,MCE,CX8,MMX
real mem  = 41529344 (40556K)
avail mem = 33529856 (32744K)
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo

top:

load averages:  0.10,  0.11,  0.09
31 processes:  1 running, 30 idle
CPU states:  0.3% user,  0.0% nice,  0.2% system,  0.2% interrupt, 99.4% idle
Memory: Real: 9360K/19M act/tot  Free: 16M  Swap: 4K/64M used/tot

/etc/ppp/peers/ipaq:

-detach
noauth
lock
debug
user ppp
connect '/usr/sbin/chat -v -t3 ogin--ogin: ppp'
tty00 115200 nocrtscts
192.168.1.1:192.168.1.46