[Info-vax] terminal servers etc

[Phillip Helbig---undress to reply]

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.

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.

> 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?