[Info-vax] terminal servers etc

[Phillip Helbig---undress to reply]

In article <kcdaks$d2v$1 at dont-email.me>, David Froble
<davef at tsoft-inc.com> writes: 

> >>> Yes, I have some BNC terminators.  Should one go just on the DEChub
> >>> (i.e. the backplane) or on the DECserver as well?
> >> Only on the DEChub90 (The BNC - and the UTP - of the DECserver is unused if
> >> plugged into a DEChub90). You don't even have the space on the side for it.
> > 
> > OK, if it is in the hub, everything works through the hub, meaning the 
> > BNC connection on the hub goes to the outside world.  If not, then the 
> > BNC (terminate if not used) and UTP connectors to the outside world 
> > work.
> > 
> > I see that the DECserver (but not the DECrepeater) also has a power 
> > connection on the back, so can be run outside the hub.  The repeaters 
> > presumably don't need power, or get what they need through the 
> > backplane.
> 
> I don't know what you're looking at, and some loose terminology is being 
> thrown around in this topic.
> 
> The DECserver90TL, at least the ones I have, has the backplane 
> connector, the 10base2 connector on the side, and a power socket if the 
> unit is being used without the DEChub90.  (Or DEChub900).

My DECserver90TL has 11 LEDs and 8 UTP ports on the front, 2 serial 
ports and a "circular switch" as well as a power connector on the back 
and a BNC ethernet connector on the TOP.  This is looking at it so that 
all printing is horizontal, like a book lying down.  No backplane 
connector.

My DECrepeater 90T-16 is in the same box and looks the same as the 
DECserver90TL except for the front, where it has 16 UTP ports.

My DECrepeater 90T (2 of them) look the same as the DECserver90TL except  
that on the back there is neither a serial connector nor the circular 
switch but there is the backplane connector.

The DECserver 90M looks like the DECrepeater 90T from the back and on 
the front has 8+1 UTP.  Here, the 8 LEDs are in two rows of four; other 
models have all 11 in one row except the 90T-16 which has 2 rows of 2.

> Bart is causing me to go to the basement to dig out the only 
> DECserver90M that I have, which I believe is non functional.  I don't 
> ever remember any twisted pair connection on any of the DEChub90 
> modules.  There was I believe a command port, and possibly something 
> else, but not a twisted pair RJ45 port.
> 
> > On another server and repeater (not in the hub and no connector for it), 
> > there is the same power connector, but an additional circular switch.  
> > What is the latter for?
> 
> Never saw any switches.  Note, there were the modules sold as stackable, 
> but I never saw one of them.

Apparently there are several different boxes with the same name.