VisorCentral.com - problems with serial terminal

Show 20 posts from this thread on one page

VisorCentral.com (http://discussion.visorcentral.com/vcforum/index.php)
- How To / Troubleshooting (http://discussion.visorcentral.com/vcforum/forumdisplay.php?forumid=2)
-- problems with serial terminal (http://discussion.visorcentral.com/vcforum/showthread.php?threadid=14484)

Posted by mad_ip_address on 04-28-2001 01:35 PM:

I've successfully configured some intel harwdare (switches and vpn units) with my visor and a serial telnet (I've successfully used ptelnet, online from markspace and Mterm), using both the standard serial cradle and a serial cable by atlcables.
The problem is I cannot find a way to use my visor with 5xx series switches (always from intel). I've tried with all the combinations of cables&programs described above, but my visor simply refuses to connect
anyone has a clue?

thank you very much, I'm tired of dragging about a heavy big notebook

__________________
> Quid est veritas? <

Posted by MarkEagle on 04-28-2001 05:08 PM:

I'm not familiar with the 5xx hardware but if they require any of the serial control lines that could be the problem since the Visor doesn't have anything other the TX and RX.

__________________

God bless America, my home sweet home...

Posted by mad_ip_address on 04-28-2001 07:42 PM:

quote:
Originally posted by MarkEagle
I'm not familiar with the 5xx hardware but if they require any of the serial control lines that could be the problem since the Visor doesn't have anything other the TX and RX.

it is possible, however the serial console does not require any kind of flow control (software or hardware), at least not from a pc connection.
do you have any positive experience using a visor with any other kind of serial communications? maybe the problem is limited to intel switches

thank you for your replying

__________________
> Quid est veritas? <

Posted by MarkEagle on 04-28-2001 08:19 PM:

quote:
Originally posted by mad_ip_address
do you have any positive experience using a visor with any other kind of serial communications?

To be honest, I've only connected my VDx to an external modem, which worked fine.

__________________

God bless America, my home sweet home...

Posted by mad_ip_address on 05-02-2001 09:48 PM:

seems to be an intel's problem

it seems it's not Visor's fault after all, according to a post I've just found on intel's support messageboard, some of their switches works just with a nullmodem cable "with all the pins wired".
but the best (or the worst) is that at intel's support have not the slightest idea about why or on wich device it happens.

and, BTW, what the heck "all the pins wired" means

__________________
> Quid est veritas? <

Posted by dessa on 05-03-2001 05:57 PM:

All Pins Wired?

My guess would be that all pins need to be sensible as either at ground or signal level and not 'connected' to air.
I suspect they have a (buggy) active level sensing scheme.

Posted by btabatow on 05-18-2001 12:19 AM:

Intel pinout?

Do you have a pinout of the Intel device's serial connector? If you do, I could probably give you some helpful suggestions as to how to connect to it.

Posted by mad_ip_address on 05-18-2001 12:56 PM:

Re: Intel pinout?

quote:
Originally posted by btabatow
Do you have a pinout of the Intel device's serial connector? If you do, I could probably give you some helpful suggestions as to how to connect to it.

unfortunately I have no idea about the pinout, and seems also nobody Intel's support have. At intel's forum they gave this response to the pinout question:

"I do not have a pin-out to post here. I do know that Intel provides
with each Intel(R) Express 500 Series Switch a null modem cable that
will work to manage them. In our experience, most high quality null
modem cables work fine as well."

the full thread can be found via http at http://intelforums.com/cgi-bin/WebX...160.hVnrahAcdVe^[email protected]

It seems to me Intel guys are not very responsive on this particular issue

and I have not a personal cable to tear apart.
Anyway I'll test one at office without destroying it, hope I'll find out something.

Thank you for your replying

__________________
> Quid est veritas? <

Posted by MPM on 05-18-2001 09:16 PM:

Re: seems to be an intel's problem

quote:
Originally posted by mad_ip_address
it seems it's not Visor's fault after all, according to a post I've just found on intel's support messageboard, some of their switches works just with a nullmodem cable "with all the pins wired".
but the best (or the worst) is that at intel's support have not the slightest idea about why or on wich device it happens.

and, BTW, what the heck "all the pins wired" means

"all the pins wired" does not make sense in the context of a null modem cable.

There are two types of null modems:

1) A "full handshake" version that not only crosses the transmitt and receive pair, but also crosses all the handshaking and flow control signals also.

2) A "no handshake" version that crosses the transmitt and receive pair, but does not connect the hanshaking or flow control lines between the two devices. Instead it simply feed the output handshake lines from each device back into the input handshake lines for the same device. This way both devices think the other one is "always ready". This is likely the kind of null modem that you want to use with your Visor.

The term "all pins wired" is usually used for serial extension cables which are described like "all pins wired straight through". Null modems are never wired straight through by definition.

All times are GMT. The time now is 02:47 AM.

Show 20 posts from this thread on one page