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Operating Systems Linux Urgent - serial port
# 1  
Old 08-04-2008
Urgent - serial port
Hi All,
I am a begineer in Linux, I have 4 ports and 3 are operational port 1,port 2 and port 4 (when I plug in serial device I can see it working) but port 3 seems it is not working.
I am sure the hardware is fine.

when I give command

dmesg | grep tty

I get,
serial 8250:ttyS0 at I/O 0x3f8 (irq=4)is a 16550A
serial 8250:ttyS1 at I/O 0x2f8 (irq=3)is a 16550A
serial 8250:ttyS2 at I/O 0x3e8 (irq=4)is a 16550A
serial 8250:ttyS3 at I/O 0x2e8 (irq=3)is a 16550A
0:05:ttyS0 at I/O 0x3f8 (irq=4) is a 16550A
0:06:ttyS1 at I/O 0x2f8 (irq=3) is a 16550A
0:09:ttyS3 at I/O 0x2e8 (irq=11) is a 16550A

I also tried setserial -g /dev/ttyS2 but getting the same result

My Qustion is:
1) what is the difference b/w first 4 lines and last three lines and Y is port 3(ttyS2) not getting displayed in b/w last three lines.
2) Is there something I have to do to enable port 3.
2)Please help me out to get the port 3 into working condition


Thanks in advance
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LEARN ABOUT DEBIAN

sredird

sredird(8)							      sredird								sredird(8)

NAME

       sredird - RFC 2217 serial port server

SYNOPSIS

       sredird [-i] log-level serial-device lock-file [poll-interval]

DESCRIPTION

       This manual page documents briefly the sredird, program.

       This  program  when  run  through inetd will use the RFC 2217 extensions to TELNET to implement serial commands over the TCP connection and
       interface to a specified serial port.

OPTIONS

       An optional first parameter is '-i' to enable compatability with Cisco IOS.

       The first mandatory parameter is the log level for use in syslog.  The next mandatory parameter is the device node for the  serial  device,
       it  must  be  a	fully  qualified  path.   The  final mandatory parameter is the file name for the lock file to be used to prevent multiple
       instances of sredird from talking to the serial port at the same time, or to allow sharing a port between modem and sredird.

EXAMPLE

       Here is a configuration line for running it from inetd: sredir	       stream  tcp     nowait  root    /usr/sbin/tcpd /usr/sbin/sredird  5
       /dev/modem /var/lock/LCK..modem

AUTHOR

       This  man page was written by Russell Coker <russell@coker.com.au>.  May be freely used and distributed without restriction under the terms
       of the GPL.

       The sredird program was written by Denis Sbragion <d.sbragion@infotecna.it> and Jeffrey Altman <jaltman@columbia.edu>.

Russell Coker <;russell@coker.com.au>				       2.2.0								sredird(8)