🚀 go-pugleaf

On Thu, 11 Sep 1997 19:44:46 +1000, Andrew Pollock <apollock@bit.net.au> wrote:
>Hi,
>
>We'd like to be able to telnet to our PABX, which has the option of having a
>serial cable connected to it. We want to be able to connect a Linux box to
>it via a serial cable and telnet to the Linux box and connect to the PABX
>via the serial connection.
>

Seems simple to me.  discover what parameters the
PABX xwants - probably something like 9600 speed, N, 8, 1.
I'd also delete all the modem setup and reset strings.

connect the linux box to the PABX, and use minicom set to the
right port and speed and so on and see if you 
can talk to the PABX.

Once you have the linux box chatting to the the phone, you are
set.  Plug your linux box xinto whatever network you have that
you are telnetting via, telnet to the linux boxx, and run
minicom from your telnet session.

minicom comes with the redhat distribution.
Zebee

Andrew Pollock (apollock@bit.net.au) wrote:

: We'd like to be able to telnet to our PABX, which has the option of having a
: serial cable connected to it. We want to be able to connect a Linux box to
: it via a serial cable and telnet to the Linux box and connect to the PABX
: via the serial connection.

: Has anyone done this before, or does anyone know how to do it?

I think you have the terminology wrong.  The pabx supports a serial
console or terminal on an RS-232 port.  Thats not the same as a telnet.

The good news is if you link a null-modem cable to the pabx and then to a
spare serial port you will be able to telnet to the linux box and run
something like minicom to access the pabx.

I've done similar with a router.
-- 
--
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`'`'`'`'`'`'`'`'`'                    "A: Or avpr gb zr"

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I can think of only PPP?????

Andrew Pollock (apollock@bit.net.au) wrote:
: Hi,

: We'd like to be able to telnet to our PABX, which has the option of having a
: serial cable connected to it. We want to be able to connect a Linux box to
: it via a serial cable and telnet to the Linux box and connect to the PABX
: via the serial connection.

: Has anyone done this before, or does anyone know how to do it?

: TIA

: Andrew

Zebee Johnstone wrote:
> 
> On Thu, 11 Sep 1997 19:44:46 +1000, Andrew Pollock <apollock@bit.net.au> wrote:
> >Hi,
> >
> >We'd like to be able to telnet to our PABX, which has the option of having a
> >serial cable connected to it. We want to be able to connect a Linux box to
> >it via a serial cable and telnet to the Linux box and connect to the PABX
> >via the serial connection.
> >
> 
> Seems simple to me.  discover what parameters the
> PABX xwants - probably something like 9600 speed, N, 8, 1.
> I'd also delete all the modem setup and reset strings.
> 
> connect the linux box to the PABX, and use minicom set to the
> right port and speed and so on and see if you
> can talk to the PABX.
> 
> Once you have the linux box chatting to the the phone, you are
> set.  Plug your linux box xinto whatever network you have that
> you are telnetting via, telnet to the linux boxx, and run
> minicom from your telnet session.
> 
> minicom comes with the redhat distribution.
> Zebee

Basically what I was thinking, but you could put minicom into either
/etc/passwd for a special 'pabx' user-id, (instead of /bin/*sh). Or at
least have it run automatically from the .login or .profile script
for that "pabx" user-id if it started up one of the more common
bin/*sh programs.

The second way is probably better because the /bin/*sh would first work
out the terminal type & size of the inbound telnet session.  i.e. vt100,
vt220, xterm, 24x80, etc. To call minicom, I'd use an 'exec
/path/to/minicom'
as this will cause the 'minicom' process to replace the /bin/*sh
process, and
the user exits minicom, there will be no shell to return to for hacking.

Brian
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Brian Miller                                 Telstra
CDN Product Group                            30/242 Exhibition Street
ITG Communication Network Platforms          Melbourne, VIC 3000
bmiller@telstra.com.au                       Australia
Tel: +61-3-9632-3883                         FAX: +61-3-9632-3884
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