10 More Discussions You Might Find Interesting
1. Solaris
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... (6 Replies)
Discussion started by: rstor
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2. Hardware
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... (5 Replies)
Discussion started by: vectrum
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3. Shell Programming and Scripting
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... (8 Replies)
Discussion started by: zilch
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4. Shell Programming and Scripting
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... (1 Reply)
Discussion started by: ilugopal
1 Replies
5. Solaris
Hi Gurus,
Can I use null modem cable in Ultra sparc 10 workstation
Thanks (3 Replies)
Discussion started by: kumarmani
3 Replies
6. IP Networking
hello all,
how to test two modems in the same device? i have ppp running in my device.. (1 Reply)
Discussion started by: s123.radha
1 Replies
7. Solaris
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 (2 Replies)
Discussion started by: waterbear
2 Replies
8. Solaris
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.... (3 Replies)
Discussion started by: waterbear
3 Replies
9. UNIX for Dummies Questions & Answers
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... (3 Replies)
Discussion started by: seethams
3 Replies
10. UNIX for Dummies Questions & Answers
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... (2 Replies)
Discussion started by: lawadm1
2 Replies
ace(7) Miscellaneous Information Manual ace(7)
NAME
ace - Serial communications interface
SYNOPSIS
controller ace0 at * slot ? vector aceintr
DESCRIPTION
The ace serial line controller provides a serial communications interface on DEC 2000, AlphaStation, and AlphaServer platforms. The serial
communications ports that are controlled by ace adhere to the RS-232 standard and can operate at rates from 50 to 115200 baud (see tty(7)).
These communications ports support serial-line printers, modems, and terminals.
In alternate console configurations (that is, no graphics head), the terminal to be the system console must be connected to the port that
is mapped to /dev/tty00. (See ports(7) for information about mapping AlphaStation and AlphaServer port labels to device pathnames.) Cur-
rently, some processors that use the ace driver limit the serial console port to 9600 baud, 8-bit, no parity and no modem support. However,
some processor consoles do support baud rates other than 9600 baud and allow the use of modems as console devices. Consult your hardware
documentation to determine the type of console support your system provides.
The driver for the ace interface supports hardware flow control using the Request to Send (RTS) and Clear to Send (CTS) signals. When
hardware flow control is enabled, the flow of input data is controlled by the RTS signal and the flow of output data is controlled by the
CTS signal. If the CTS signal is off, the driver suspends output to that line until the CTS lead is reasserted. Likewise the driver turns
off the RTS lead to tell the device connected to the line to stop sending data as a result of congestion on the host side. When the condi-
tion clears, the driver turns on the RTS lead to tell the device to resume sending data.
The DCD (carrier detect) timer value defaults to 2 seconds. This value may be changed if your modem hardware requires a different value.
the change can be made in the /etc/sysconfigtab file as follows:
ace: dcd_timer=n
where n is the time interval in seconds, and can be set to 0 (no timeout), 1, or 2 seconds. Alternatively, you can use the sysconfig com-
mand to set the same time interval option as follows:
# sysconfig -r ace dcd_timer=[n]
If you use the sysconfig command, the value will not be preserved when the system is rebooted. To preserve the setting, put the entry in
the /etc/sysconfigtab file
NOTES
If you are using the alternate system console to perform kernel debugging, you must change the kdebug entry in the /etc/remote file to use
/dev/tty01; when the kernel is running in debugging mode, no other application can use the port. See Kernel Debugging for information on
setting up your system for kernel debugging.
RESTRICTIONS
Unless alternative specifications are stated in your system hardware documentation, data communications equipment attached to the console
serial port in alternate console configurations must be set to 9600 baud, 8-bits, no parity. If a serial console is being used, /dev/tty00
cannot be opened by another process. The ace driver enforces this restriction.
Baud rates greater than 38400 are not supported on the two primary serial ports on the DEC 2000 system. However, if you use an ISA serial
or modem card that is capable of communicating at the higher rates, the higher rates are supported.
FILES
console terminal local terminal local terminal
RELATED INFORMATION
MAKEDEV(8), console(7), devio(7), modem(7), ports(7), tty(7)
Kernel Debugging
System Administration delim off
ace(7)