null modem for testing

10 More Discussions You Might Find Interesting

1. Solaris

Carrier Detection in Solaris 8 for Dial in and Null Modem Connections

I am having troubles with carrier detection for dialing in via a modem or direct connection via a null modem connection under Solaris 8 (i.e. login session remains active after the modem disconnects). I tried two different dumb modems (which do not respond to AT commands) on the machine that I am...

2. Hardware

Serial connection CAT5 instead of RS232 and Null Modem or Straight cable.

Hello, I want to connect a VT520 terminal to p3 linux box. I have two questions regarding the connection. First, is it possible to use RJ45 instead of RS232 cable. (with DB9 pin to RJ45 and DB25 to RJ45 converter). Second point is that; do i need null modem cable or straight cable...

3. Shell Programming and Scripting

Insert string 'NULL' where there is a null value

I have an input file having 7 fields delimited by , eg : 1,ABC,hg,1,2,34,3 2,hj,YU,2,3,4, 3,JU,kl,4,5,7, 4,JK,KJ,3,56,4,5 The seventh field here in some lines is empty, whereas the other lines there is a value. How do I insert string NULL at this location (7th loc) for these lines where...

4. Shell Programming and Scripting

testing a null value

Hi all, My input file having the following details, sid,worldpar0334,1024,production setup am storing all values like this C1=cut -d "," -f1 C2=cut -d "," -f2 C3=cut -d "," -f3 C4=cut -d "," -f4 so now in above case we have all values, but if my input file is like this...

5. Solaris

Null modem cable in Ultra sparc 10

Hi Gurus, Can I use null modem cable in Ultra sparc 10 workstation Thanks

6. IP Networking

Testing modem

hello all, how to test two modems in the same device? i have ppp running in my device..

7. Solaris

Is the cable you are using a null modem cable or a modem cable

Hi all, Is there any difference between a null modem cable or a modem cable ? i assume that a null modem cable is a normal cable that i used from cpu serial ports to a modem for dialup. please correct if i am wrong, thks

8. Solaris

null modem serial cable for server testing

HI all, i still have a problem when using null modem to see the output from my server(sun ultra en 3000). i followed the instruction from the internet, but it is not working. 1. i am using db9(5 4, 2 rows,put in laptop serial port) and db25(13 12, 2 rows,put in (A) server serial port). 2....

9. UNIX for Dummies Questions & Answers

Hyperterminal null modem connection to Solaris

I am new to Unix. I just got my SUN box from ebay with Solaris supposedly preloaded. The problem is I am unable to connect via Hyperterminal to Solaris, or more to the point, cannot tell if I have a successful connection and that solaris is the one not properly booted up. I hooked up a null...

10. UNIX for Dummies Questions & Answers

Modem - Test /dev/modem

Ok. I tried following the directions from some of the other threads, but I've hit a road block. I have red hat 7.3 and I installed the hcf package: hcfpcimodem-0.99lnxtbeta03042700k2.4.18_3-1rh.i386.rpm It installed ok, no errors, but I still can't get linux to find my modem. I've tried...

LEARN ABOUT NETBSD

slattach

SLATTACH(8)						    BSD System Manager's Manual 					       SLATTACH(8)

NAME

     slattach -- attach serial lines as network interfaces

SYNOPSIS

     slattach [-Hhlmn] [-s baudrate] [-t ldisc] ttyname

DESCRIPTION

     slattach is used to assign a tty line to a network interface which uses asynchronous serial lines.

     Currently the slattach command is used to attach sl(4) or strip(4) interfaces.  These interfaces have to be created using the ifconfig(8)
     create subcommand before the slattach command.  The network source and destination addresses and other interface parameters are configured
     via ifconfig(8).

     The following operands are supported by slattach:

     -H 	   Turn on DTR/CTS flow control.  By default, no flow control is done.

     -h 	   Turn on RTS/CTS flow control.  By default, no flow control is done.

     -l 	   Turn on the CLOCAL flag, making it possible to run SLIP on a cable without modem control signals (e.g. DTR, DSR, DCD).

     -m 	   Maintain modem control signals after closing the line.  Specifically, this disables HUPCL.

     -n 	   Don't detach from invoking tty.

     -s baudrate   Specifies the speed of the connection.  If not specified, the default of 9600 is used.

     -t ldisc	   Specifies the line discipline to use for the tty.  Supported line disciplines are ``slip'' (creates a sl(4) instance) and
		   ``strip'' (creates a strip(4) instance).  If this option is not specified, the default is ``slip''.

     ttyname	   Specifies the name of the tty device.  ttyname should be a string of the form 'ttyXX', or '/dev/ttyXX'.

     Only the super-user may attach a network interface.

     To detach the interface, use ``ifconfig interface-name down'' after killing off the slattach process.  Interface-name is the name that is
     shown by netstat(1).

EXAMPLES

	   slattach ttyh8
	   slattach -s 4800 /dev/tty01

DIAGNOSTICS

     Messages indicating that the specified interface is not configured or created, the requested address is unknown, or that the user is not
     privileged but tried to alter an interface's configuration.

SEE ALSO

     netstat(1), daemon(3), netintro(4), sl(4), strip(4), ifconfig(8), rc(8), sliplogin(8), slstats(8)

HISTORY

     The slattach command appeared in 4.3BSD.

BUGS

     There is no way to specify the interface name (sl%d etc.) to be attached by the slattach command.	There is no way to see which interface is
     assigned to the specified tty by the slattach command, either.

     It would be better if the network interfaces were created by the slattach command rather than by using the ifconfig(8) create subcommand
     before the slattach command.

BSD
								   July 8, 2006 							       BSD

Solaris