/solaris/ /solaris/
This page contains detailed step
by
step instructions to configure Solaris
and Solaris
for high
speed dial
out and dial
in using V
modems
It shows how to use Solaris to dialup and connect to a remote system with the Solaris system acting as a terninal on the remote system
It also shows how to configure Solaris to answer an incoming telephone call and provide terminal access to the calling system
It doesn
t cover connecting a Solaris system to an ISP; this is a special form of dial
out and is covered in Configuring PPP on Solaris to connect to an ISP
It also doesn
t cover configuring a Solaris system as a PPP server
accepting incoming PPP connections; this is covered in Configuring PPP dial
in on Solaris but this page is a prerequisite before configuring a PPP server
What this page does cover is using Solaris to dialup a remote system and run a terminal session on that remote system
It also covers the reverse scenario: allowing remote systems to dialup your Solaris system and run terminal sessions on it
Why would you want to do this? You may want to use your Solaris system to connect to a BBS
for example
or to any remote system which allows terminal
mode dial in access
Or you may want to configure your Solaris system at the office to give your customers dial in access or to enable you to connect to it from a Windows PC at home
Important Notes
The instructions assume that your modem is external and attached to one of the two standard serial ports
Note that you must have a real modem; monstrosities known as WinModems are of no use whatsoever with unix
Unfortnately
I have no experience of using internal modems with Solaris and there may be additional configuration issues with these
I
m not able to advise about issues with internal modems but there
s some useful advice at Celeste Stokely
s Web pages and especially in her Tutorial on Solaris
x Modems & Terminals
Celeste
s pages cover the configuration of modems in very much more detail than is offered here and are highly recommended for further reading
This page is intended to provide a simple
step
by
step procedure which should work for most people
Now for the instructions
No unix knowledge is assumed
other than the ability to edit files using a text editor
Configuring Solaris for high
speed dial out
Please note that you must be logged in as root while implementing these instructions
These instructions describe how to configure Solaris and your modem for dial
out to a remote computer
Implement these instructions first
even if you want to configure your system for dial in access
Configure your serial port for dial out
Start admintool under CDE:
# admintool &
Select the Browse menu and then Serial Ports from the drop
down list
Click on the line starting a if your modem is attached to the first serial port or on the line starting b if your modem is connected to the second serial port
Select the Edit menu and then Modify from the drop
down list
Change the following fields:
Template: Modem
Dial out Only Baud Rate:
Cick on OK and close admintool
Test communication with the modem
The unix command
tip
is used to communicate with a modem
If you
re interested in the gory detail
the manual page for this command can be displayed by typing:
# man tip
If your modem is attached to the first serial port:
# tip /dev/cua/a
If your modem is attached to the second serial port:
# tip /dev/cua/b
and the command should respond:
connected
If it responds:
All ports busy
it means either that your serial port is configured incorrectly
perhaps for dial in instead of dial out
or that there is a more fundamental problem in communicating with the port
In this case
have a look at Celeste Stokely
s Tutorial on Solaris
x Modems & Terminals which contains a wealth of useful information about modems
Type:
ATZ
and the modem should respond:
OK
If there
s no response from the modem
check that you
re using a straight
through cable with pin
at one end connected to pin
at the other end
pin
to pin
and so on
A
null
modem
or cross
over cable
designed for use with a terminal
will not work
Type:
ATI
Most modems respond to this command by reporting their current settings
If this doesn
t work
try AT&v
ATL
ATL
ATL
or AT*c
If all else fails
consult your modem manual
When using a
COM USR V
modem
it responds:
U
S
Robotics
K Message Settings
B
E
F
L
M
Q
V
X
Y
SPEED=
PARITY=N WORDLEN=
DIAL=TONE OFF LINE
&A
&B
&C
&D
&H
&I
&K
&M
&N
&P
&R
&S
&T
&U
&Y
Note that the actual speed at which Solaris is communicating with the modem is only
baud
or
characters per second
despite the speed having been set using admintool to be
The reason for this is that tip defaults to a speed of
baud and we
ll fix this in the next step
Close tip by typing
ENTER key
tilde
full stop
as three key strokes:
~
Set the modem DTE speed
Edit the file /etc/remote and insert a line at the start of this file reading: modem:dv=/dev/cua/a:br#
if your modem is attached to the first serial port
or: modem:dv=/dev/cua/b:br#
if your modem is attached to the second serial port
This enables us to communicate with the modem at a speed of
bits per second
It
s important to understand that there are two speeds to be considered in modem communication
There
s the speed at which the host computer talks to a connected modem and this is known as the Data Terminal Equipment or DTE speed
There
s also the speed at which the modem transmits and receives data across the telphone line and this is known as the Data Communication Equipment or DCE speed
A
K or V
modem is capable of a DCE speed of up to
K
although this is unlikely to be achieved in practice
Data sent down a telephone connection is often compressed with the receiving modem uncompressing the data before sending it to the host computer
So a modem to modem speed (DCE) of
K could result in a modem to computer speed (DTE) well in excess of
K
For this reason
the DTE speed should be set at least
% higher than the maximum DCE speed and a DTE speed of
is recommended for use with
K modems
However
not all Sun hardware is capable of talking to a serial port at this speed
If you have a Sun Ultra
or better
or an Intel P
or better
your system should be able to sustain a DTE speed of
If you have an older Sun system
you may well not be able to drive a V
modem at its maximum speed and will need to experiment to find the highest DTE speed that your hardware supports
If
doesn
t work
try specifying
or
in the line in /etc/remote
Test high
speed communication with the modem
Try the tip test again
this time specifying the name of the new entry in /etc/remote as a parameter to tip and you should be rewarded with a high
speed connection to the modem:
# t
From:http://tw.wingwit.com/Article/program/Java/JSP/201311/19174.html
