09-26-2011
Thanks for the prompt reply!
If you look at the image file I attached, you will see that I have a USB to serial cable already. Is it the same as a null modem cable? (as my laptop doesn't have a serial out/vga out) I mean, I can attach the serial end of it to the B port on server and USB end to laptop, will that do? Or do I have to get a null modem cable anyway?
Also, for the past 10 hours having trouble with this USB to serial cable, not being picked up by my Windows 7 anymore (used to work fine!) so have ordered one more; and when that comes in will try to connect it to B port of server ( is that what you meant? coz I was connecting it to the DB25 port of the server before by using a DB25 to RJ45 adapter )
Many thanks.
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UMCS(4) BSD Kernel Interfaces Manual UMCS(4)
NAME
umcs -- USB support for serial adapters based on the MCS7820 and MCS7840 chips
SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file:
device usb
device ucom
device umcs
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
umcs_load="YES"
DESCRIPTION
The umcs driver provides support for various multiport serial adapters based on the MosCom MCS7820 and MCS7840 chips. They are 2- or 4-port
adapters with full-featured 16550-compatible UARTs and very flexible baud generators. Also, these chips support RS422/RS485 and IrDA opera-
tions.
The device is accessed through the ucom(4) driver which makes it behave like a tty(4).
Different ports on device are presented as sub-units, like /dev/ttyU0.1 and /dev/ttyU0.2.
HARDWARE
The umcs driver was tested on the following adapters:
o ST Lab U-360 two-port serial USB adapter
o ST Lab U-400 four-port serial USB adapter
SEE ALSO
tty(4), ucom(4), usb(4)
HISTORY
The umcs driver appeared in ports since December of 2010.
AUTHORS
The umcs driver was written by Lev Serebryakov <lev@FreeBSD.org>.
BUGS
This driver doesn't support access to any fine tunes of chip, like RS522/RS485 mode, non-standard baudrates, etc.
BSD
February 25, 2012 BSD