set connection to a modem

[s m]

thanks guys for your replies,

now i understand two types of connections are available by modem, dial-in
and dial-out.
honestly, i should do it for my boss and don't know what he should want
exactly to do but i am sure that he has an external serial modem and wants
to config it by AT commands via a freebsd system; therefore i think our
connection is dial-out.

now which files i should edit? just ppp.conf? and because our modem
supports specific speed and flow control, is it necessary to set these
parameters in my freebsd? and if yes, how i can do that?  please help me to
do that

thanks

On Wed, Nov 28, 2012 at 7:35 PM, Polytropon <freebsd at edvax.de> wrote:

> On Wed, 28 Nov 2012 13:44:18 +0330, s m wrote:
> > hello guys,
> >
> > i want to connect my freebsd system to modem and configure it via my
> > freebsd.
>
> For doing _what_ exactly? I ask because depending on your
> goal there might be different approaches neccessary:
>
> a) dial out to connect to the Internet
> b) dial out to dial in to something else (e. g. shell access)
> c) dial out to send a fax
> d) dial out to make annoying phone calls :-)
> e) dial in so people can dial your system and log in
> f) dial in so people can send you fax
> g) dial in so you can control something using DTMF
> .......
>
> There are many possibilities, each requiring a different
> thing to do on FreeBSD (because they are obviously different(.
>
> And of course: Are you talking about a real modem (external
> serial modem), some modem card (often dysfunctional "WinModem"),
> or a USB modem? Brand and model?
>
>
>
> > i thought that i should change /etc/ttys file to set speed and
> > other configuration.
>
> Wouldn't you better do this with ppp.conf? Just assuming you
> want to dial _out_.
>
>
>
> > in order to check if i am right or not, i comment ttyu
> > line in ttys file and expect the modem got disconnected but the modem
> still
> > works and can access to it.
>
> The /etc/ttys file doesn't restrict you in controlling the
> modem from your host system.
>
>
>
> > i googled and found that there are three files in /etc that we can edit
> > them to configure our devices: /etc/ttys, /etc/gettytab and
> > /etc/rc.d/serial.sh. moreover we can edit init file for each device in
> /dev
> > to set default speed and other configuration by stty command.
>
> Also depends on _what_ you are going to do.
>
>
>
> > now i am confused and don't know which file i should edit to set speed
> and
> > flow control and other setting to have a connection to my modem. i mean
> > from which file i can configure my connection? i know it's too easy but
> > please clear it for me.
>
> Really, I assume you're talking about dialing out with a serial
> modem in order to connect to the Internet (or some other system),
> and then be "networked" with it.
>
> In that case you would add an entry to /etc/ppp/ppp.conf. Allow
> me to provide an example that I've been using on FreeBSD 4 and 5:
>
> # PPP Configuration File
> # See /usr/share/examples/ppp/ for some examples
> # $FreeBSD: src/etc/ppp/ppp.conf,v 1.8 2001/06/21 15:42:26 brian Exp $
>
> default:
>         set log Phase Chat LCP IPCP CCP tun command
>         ident user-ppp VERSION (built COMPILATIONDATE)
>         set device /dev/cuaa0
>         set speed 115200
>         set dial "ABORT BUSY ABORT NO\\sCARRIER TIMEOUT 5 \"\" AT OK-AT-OK
> ATE1Q0 OK \\dATDT\\T TIMEOUT 40 CONNECT"
>         set ifaddr 10.0.0.1/0 10.0.0.2/0
>         set timeout 180
>         enable dns
>
> papchap:
>  # edit the next three lines and replace the items in caps with
>  # the values which have been assigned by your ISP.
>         set phone PHONE_NUM
>         set authname USERNAME
>         set authkey PASSWORD
>         set ifaddr 10.0.0.1/0 10.0.0.2/0 255.255.255.0 0.0.0.0
>         add default HISADDR
>
> mymodem:
>         set phone 01234567890
>         set authname myname
>         set authkey mypass
>         add default HISADDR
>
> The example name I've chosen here is "mymodem". Change it
> to something meaningful. :-)
>
> The essential authorisation data here is the phone number
> of 01234567890, the username 'myname' and the password 'mypass'
>
> Note that today it may be required to change the device name!
> I haven't tried to do anything with a modem on current FreeBSD,
> so I can't be more specific, sorry.
>
> The device name /dev/cuaa0 will probably need a change. And
> then "set speed 115200" sets the speed you need.
>
> If you've done everything properly, you would do something like
>
>         # ppp mymodem
>         ppp> dial
>
> Then the modem should dial. With "close" you close the connection.
> There are options for /etc/rc.conf (the ppp_* variables) that
> allow you to automate things, like "dial on demand".
>
>
>
>
>
> In contradiction, in /etc/ttys something like
>
>         ttyd0   "/usr/libexec/getty std.9600" dialup   on  secure
>
> would enable you a serial "console access" (e. g. to connect a
> serial terminal to) at a speed of 9k6 (e. g. a DEC vt100). When
> connected via serial cable, you would receive a login prompt.
>
> Again, note that ttyd0 might not be valid here.
>
>
>
>
>
> --
> Polytropon
> Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
>