[rescue] Sun SBus serial cards

[Dave McGuire]

   It would definitely work; that's essentially what the AS5200 was 
designed to do.  We did it with a great many of them at Digex.

            -Dave

On 7/14/23 10:38, Patrick Giagnocavo via rescue wrote:
> Have you considered using a separate device like the Cisco AS5200 
> series, to handle the modems?  Then, just go over Ethernet to the 
> Sparcstation - I think that would work?
> 
> Cordially
> 
> Patrick
> 
> On Thu, Jul 13, 2023 at 9:15 PM Mark Price via rescue 
> <rescue at sunhelp.org <mailto:rescue at sunhelp.org>> wrote:
> 
> 
>     Hi Doug,
> 
> 
>         So, you need more async serial ports than the two that came on
>         the system?
> 
> 
>     Yes, I'm starting an ISP with dial-in modems, and I currently just
>     have a Sparcstation.
> 
>         Most likely the listing you found was for a Sun HSI card, which
>         in general was
>         synch serial for supportint X.25 connections. Probably not what
>         you are looking for,
>         but was very common so there are lots out there.
>         There was the SAI (Serial-Async) card, but I had never seen one
>         in the wild.
> 
> 
>     I think you're right, I found the manual for the Sun HSI card, and
>     it can't speak "low speed" serial RS-232.
> 
>         What most people did needing more async serial ports than 2 was
>         to run a terminal server
>         box over the network, such as the Xylogics or Cisco ones.
>         We had some MicroAnnex XL Xylogics boxes (8 or 16 ports).
>         Connect up a bunch of modems into the MicroAnnexXL box, and then
>         they could be setup to telnet/rsh into the Sun box automatically
>         when dialed into
>         once the user authenticated via whatever method (probably RADIUS).
> 
> 
>     Thanks for the tip, I'll check into Xylogics.. I actually have a
>     Xyplex terminal server, but it has been a total pain to work with. 
>     I know Cisco had the AS5300 with digital modems, but I'm not
>     familiar with their other terminal server options, I'll check it out.
> 
> 
>     Mark
> 
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> 
> 
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-- 
Dave McGuire, AK4HZ
New Kensington, PA