pci faxmodem device file

[uhlhorsr <stephen.uhlhorn@vanderbilt.edu>]

I'm having problems setting up mu USRobotics Performance Pro modem (3CP5610A). 
I built and installed a new kernel (2.4.7), since kernel 2.3 and higher are 
supported. The modem is recognized without problems:

lspci -vv gives:

02:0a.0 Serial controller: US Robotics/3Com 56K FaxModem Model 5610 (rev 01) 
(prog-if 02 [16550])
	Subsystem: US Robotics/3Com: Unknown device 00d7
	Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- 
SERR+ FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- 
<MAbort- >SERR- <PERR-
	Interrupt: pin A routed to IRQ 11
	Region 0: I/O ports at dff0 [size=8]
	Capabilities: [dc] Power Management version 2
		Flags: PMEClk- AuxPwr- DSI- D1- D2+ PME+
		Status: D0 PME-Enable- DSel=0 DScale=2 PME-

and dmesg gives:

Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI 
enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
PCI: Found IRQ 11 for device 02:0a.0
Redundant entry in serial pci_table.  Please send the output of
lspci -vv, this message (4793,4104,4793,215)
and the manufacturer and name of serial board or modem board
to serial-pci-info@lists.sourceforge.net.
ttyS04 at port 0xdff0 (irq = 11) is a 16550A

It appears the kernel is giving the modem /dev/ttyS04, but I have no device 
files /dev/ttySXX. My serial devices are ttyS[0-3] (1 digit only, not 2). I 
tried using setserial to assign the irq, and i/o to ttyS1, but setserial said 
the recources were in use.

Anyone have any suggestions? I'm running a stock potato system (except for the 
kernel).

Thanks,
Stephen

P.S.- Please copy to stephen.uhlhorn@vanderbilt.edu...I'm not on debian-user.