[Info-vax] USB/DB9 terminal converter for RX2660

[John E. Malmberg]

On 6/3/2016 8:06 AM, Jan-Erik Soderholm wrote:
> Den 2016-06-03 kl. 12:30, skrev VAXman- at SendSpamHere.ORG:
>> In article <nirchj$5u7$1 at news.albasani.net>, Jan-Erik Soderholm
>> <jan-erik.soderholm at telia.com> writes:
>>> Den 2016-06-03 kl. 05:06, skrev Steven Schweda:
>>>>> I'm not 100% sure what you are trying, [...]
>>>>
>>>> I'm with him.  Around here, most of the simple-minded (serial)
>>>> system consoles (HP PA-RISC workstation, HP zx2000, Sun workstation,
>>>> VAX, XP1000, ...) are connected to DECserver terminal server ports,
>>>> which can be reached by LAT from my main Alpha system.  (I haven't
>>>> tried it, but I suspect that I could arrange to use Telnet for that
>>>> part, too.)
>>>
>>> Yes, if you have a DECserver new enough to have TCPIP. You do not say,
>>> and I don't going to guess, but if it has TCPIP you simply connect to
>>> the IP address of the server and to the IP port number of the actual
>>> serial port.
>>
>> Why TCP/IP?  I connect to services from linhx via LAT.  There's LAT
>> available for linux; I've not bothered looking into it for Mac as there
>> are already way too many problems in Mac OSX -- especially, el crapitan
>> -- to bother.
>>
>
>
> Why TCP/IP instead of LAT? Is that a joke? Do I realy need to
> tell *you* that? But OK, for everyone else then...
>
> - LAT is not routable. You are restricted to the local LAN (subnet).
> - PuTTY (and many other emulators) does not support LAT.
> - You will probably find TCP/IP by default on more (client) platforms.
>
> Both the first and the second are enough as show-stoppers, of course.

True enough, but LAT can give you an SS$_HANGUP notification if 
something happens to the connection.  With the reverse Telnet, you have 
to detect a command timeout.  And on outgoing VMS connections, (Back in 
the UCX 4.x days) I had to delete and recreate the TNA device after a 
disconnection.

So if LAT is available, it does have some advantages over TCP/IP.

Regards,
-John
wb8tyw at qsl.net_work
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