[Info-vax] terminal servers etc

[VAXman- at SendSpamHere.ORG]

In article <kcbd7q$7nh$1 at online.de>, helbig at astro.multiCLOTHESvax.de (Phillip Helbig---undress to reply) writes:
>In article <6a9348c5-8325-4041-bcb9-a1dc90b8b520 at googlegroups.com>, Bart
>Zorn <bart.zorn at gmail.com> writes: 
>
>> I would suggest using only the 90M, because that is the only one that
>> has twisted pair ethernet. It has both LAT and TCP/IP and it does not
>> need a MOP or bootp load host because it has flash memory built in. 
>
>Sounds like a good idea.  The 90M (along with two DECrepeater 90T) is
>connected to a backplane.  With the 90M, I won't need the repeaters at
>all since as you say it has a twisted-pair connector (otherwise I would
>have to use BNC to go from the server to a repeater, and then
>twisted-pair from the repeater to the twisted-pair switch).  Flash 
>memory also sounds more convenient and perhaps I'll need TCP/IP at some 
>point.

It's only 10baseT, mind you!



>The DEcserver 90TL and a 16-port DECrepeater 90T are standalone, i.e. 
>don't need the backplane.  I have a couple of the power supplies and a 
>little box which can hold a power supply and something which uses it.

The stacking boxes?



>> You will like the command interface: it has SET and DEFINE and of
>> course SHOW. It has also CHANGE, which does what SET and DEFINE do
>> combined in a single command! 
>
>Nice idea.  LANCP has SET DEVICE/PERMANENT_DATABASE and DEFINE
>DEVICE/VOLATILE_DATABASE which will copy permanenet to volatile and 
>vice-versa, better than having to do them separately as with TCPIP.  But 
>CHANGE is even better!
>
>> The DEChub 90 itself has only a 10baseT connection. But all plugged in
>> devices are connected to that same segment: it is a hub. You should put
>> a 50 Ohm terminator on the BNC of the DEChub if you do not connect a
>> coax cable. 
>
>Yes, I have some BNC terminators.  Should one go just on the DEChub
>(i.e. the backplane) or on the DECserver as well?

You do NOT need to terminate the DEC*90* devices with BNC connectors if
they are in the DEChub.  In fact, since the can be placed in the DEChub
in close proximity, there's not ROOM to put on a terminator.

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