QUESTION:
I have an rs/6000 at aix v3.2.5 and have a 7855-10 modem connected to
s1 and want to be able to dial in to it asynchronously. I have the
port set to 9600, 8,N,1 and cannot even get the modem to answer an
incoming call. Can you give me the settings for the modem as they
would be entered from the front panel? I have tried many iterations
and still cannot get it to work.
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A: I will append the document "Setting up the IBM 7855 Modem".
This document contains helpful information for configuring
your RISC/6000 so that you are able to dial in and out of
the same port using a 7855-10 modem.
Setting Up the IBM 7855 Modem
----------------------------------------------------------------
NOTE: This document is provided as an aid by the Austin AIX
Support Center. If you need further assistance on non-
defect issues, contact your local branch office or point of
sale, or call 1-800-CALL-AIX for information about support
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on a variety of subjects may be ordered from
1-800-IBM-4FAX.
DISCLAIMER: The information contained in this document is
distributed "AS IS" without any warranties of any kind either
expressed or implied. IBM will not be responsible for any direct,
incidental, consequential, special or indirect damages. IBM
EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY AND
ANY IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
The use of this information or the implementation of any of
these techniques is the sole responsibility of the customer and
depends on the customer's ability to evaluate and integrate this
information or implementation into the customer's operational
environment.
________________________________________________________________________
This document contains the following sections:
Dial-In and Dial-Out
TTY Settings in SMIT
Systems File
Devices File
Dialers File
Programming the 7855
Setting RTS Line Discipline
In the following instructions, "tty0" is an example; substitute the
appropriate tty# for the tty to which the modem is attached.
Dial-In and Dial-Out
To be used as a dial-in or dial-out modem on the RISC System/6000,
the 7855 modem must be set up to accept AT commands.
To set up the modem to accept AT commands, simultaneously press the
right and left arrow keys on the front of the modem. The front panel
should then read:
Press the right arrow to Enter, and then press the down arrow until
you see "First Setup". Then press the right arrow once. Press the
up arrow until you see "Asynchronous AT", then keep pressing the left
arrow to exit out of the setup menu.
TTY Settings in SMIT
Change the tty settings in smit by selecting Devices, TTY, and
Change/Show Characteristics of a TTY. Then select the appropriate
tty for the modem, and make the following entries in the screen.
Note: SMIT options which are not necessary are not included in the
following figure.
-------------------------------------------------------------------
Type or select values in entry fields.
Press Enter AFTER making all desired changes.
.TOP. Entry Fields
TTY tty0
TTY type tty
TTY interface rs232
Description Async Terminal
Status Available
Location 00-00-S1-00
Parent adapter sa0
PORT number .s1 . +
Enable LOGIN share +
BAUD rate .19200. +
PARITY .none. +
BITS per character .8. +
Number of STOP BITS .1. +
TIME BEFORE ADVANCING TO NEXT PORT SETTING .0. +#
XON-XOFF handshaking no +
TERMINAL type .dumb.
INPUT map file .none. +
OUTPUT map file .none. +
CODESET map file .sbcs. +
STTY attributes for RUN TIME should be:
.hupcl,cread,brkint,icrnl,opost,tab3,onlcr,icanon,echo,echoe,
echok, echoctl,echoke,imaxbel,iexten.
(No ixon/ixoff needed)
STTY attributes for LOGIN should be: .hupcl,cread,echoe,cs8.
(No ixon/ixoff needed)
-------------------------------------------------------------------
Systems File
Add the following two lines to /usr/lib/uucp/Systems file. Be sure
to start in the leftmost column.
ibm7855 Nvr IBMPROG 19200
slip Nvr SLIPPROG 19200
Devices File
Add the following lines to /usr/lib/uucp/Devices file. Be sure to
start in the leftmost column.
IBMPROG tty0 - Any IBMProgrm
SLIPPROG tty0 - Any SlipProgrm
# Usual ACU entry
ACU tty0 - Any ibm
# ACU entry to quietly dial the modem.
ACUQ tty0 - Any ibmq
# IBM7855 ACU entry to negotiate for error correction and compression
ACUECLC tty0 - Any ibmeclc
# IBM7855 ACU entry to negotiate for error correction and compression
# using large (256 byte) data block size
ACUECLB tty0 - Any ibmeclclb
# IBM 7855 ACU entry to use ECL without compression
ACUECL tty0 - Any ibmecl
Dialers File
Add the following lines to /usr/lib/uucp/Dialers file. Be sure to
start in the leftmost column.
-------------------------------------------------------------------------
# IBM 7855 program. Use ibmeclcbc for 256 byte block size. However,
# noisy lines may obtain better throughput by setting the block size to
# be 64 bytes; compressed files will show better throughput by turning
# off compression.
# The following 3 lines should be joined into one line:
IBMProgrm =,-, "" \dATQ0\r\c OK AT&F\r\c OK ATM1\r\c OK
AT&D3\r\c OK AT&C1\R2\Q2\M14\r\c OK AT&B8N1L0E0\r\c OK ATS0=1\r\c
OK ATQ1&W0&Y0\r\c ""
# IMPORTANT:
# The following 3 lines should be joined into one line:
SlipProgrm =,-, "" \dATQ0\r\c OK AT&F\r\c OK ATM1\r\c OK
AT&D3\r\c OK AT&C0\R2\Q2\r\c OK AT&B8N1L0E0\r\c OK
ATS0=1\r\c OK ATQ1&W\r\c ""
ibm =,-, "" \dATQ0\r\c OK ATDT\T\d\r\c CONNECT
ibmq =,-, "" \dATQ0\r\c OK ATM0DT\T\d\r\c CONNECT
#IBM 7855 with ECLC and Compression
# (Note two backslashes are needed before the N; cu won't send \N
# without preceding it with a \)
ibmeclc =,-, "" \dAT\\N3 C1Q0\r\c OK ATDT\T\d\r\c CONNECT
#IBM 7855 ECLC Compression with 256 byte block size
ibmeclclb =,-, "" \dAT\\N3 C1Q0\A3\r\c OK ATDT\T\d\r\c CONNECT
# IBM 7855 ECL without compression
ibmecl =,-, "" \dAT\\N3 C0Q0\r\c OK ATDT\T\d\r\c CONNECT
-----------------------------------------------------------------------
Programming the 7855
Pdisable the port (temporarily) with this command: "pdisable tty0".
On the command line enter "cu -d ibm7855".
The command will fail since we will not connect with anyone, but if
you see that the following in the output:
Sendthem (ATQ1&W0&Y0¬MNO CR)
expect: ("")
got it
the modem is successfully programmed. The LED on the front should
read
ASYN8N A 9600 a
You can then enter "pshare tty0".
Setting RTS Line Discipline
After the modem is programmed, you can set RTS line disipline to
allow hardware flow control. To do that, the modem must be connected
to another system (to bring carrier high) and this command must be run
(substitute tty0 with your tty number):
stty add rts < /dev/tty0
This will be good until next reboot; then it will need to be done
again.
Alternately, you can type in and compile the following addrts.c
program, and place a line in /etc/rc which will call the program on
system startup to add RTS to the line.
This program does not require carrier to be high.
-------------------------------------------------------------------------
/* C Program to add RTS discipline to tty port(s).
Tips:
To make the program more permanent, insert the file name of
the compiled version (complete with path) at the end of your
"/etc/rc" file and the changes will take effect again at next
program, and place a line in /etc/rc which will call the program on
system startup to add RTS to the line.
This program does not require carrier to be high.
-------------------------------------------------------------------------
/* C Program to add RTS discipline to tty port(s).
Tips:
To make the program more permanent, insert the file name of
the compiled version (complete with path) at the end of your
"/etc/rc" file and the changes will take effect again at next
reboot. Usage is "addrts /dev/tty##".
NOTE: This program is supplied "as is" and is NOT supported by
IBM. It is intended as an aid to administrators only.
_______________________________________________________________________
To create: vi addrts.c
To compile: cc -o addrts addrts.c
___________________________________________________________________ */
/* Program starts now */
#include
#include
#include
#include
main (argc,argv)
int argc;
char *argv..;
int fd;
if ( (fd = open(argv.1., O_NDELAY|O_RDWR)) <0 ) {
printf(" s: could not open s\n",argv.0.,argv.1.);
exit (22);
}
ioctl(fd, TXADDCD, "rts"); /* adds rts to the tty in the
argument */
close(fd);
-------------------------------------------------------------------------
082192RAYSC
END OF DOCUMENT
Thank you.
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This item was created from library item Q660141 CRRGZ
Additional search words:
ANSWER ASYNC ASYNCHRONOUS CRRGZ DEVICE HARDWARE IX JUN94 OZNEW
RISCADEV RISCSYSTEM 10 7855
WWQA: ITEM: RTA000042807 ITEM: RTA000042807
Dated: 06/1996 Category: RISCADEV
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