[Info-vax] DECServer 900tm Console port connection

[Stephen Hoffman]

On 2016-01-13 05:10:36 +0000, jasonkoelling at gmail.com said:

> Thank you for the quick reply: im actually trying to console into a 
> DECserver 90M+ to configure the IP address.

No need for that.  DECnet MOP works fine for that console connection, 
as others have mentioned.

> I need to make a console cable with the correct pin out and im finding 
> very little info on that model. I have cut the end off a DB9 null modem 
> cable and punched it down in a cat5e female jack in hopes that I can 
> easily re-punch it if my first try is wrong (instead of having to 
> recrimp a rj45 jack).. then just use a straight through patch cable to 
> the DECserver.  Could you provide me the direct DB9 to RJ45 pin map for 
> this model of DECserver? Any help is appreciated.

Get a breakout box, a breadboard, or minimally get a volt-ohm meter and 
some test probes.   Seriously.   The path you're on — wiring serial 
connections without the proper tools — leads to frustration and grief.  
Because not everything is as spec'd.

I'm going to assume you're using a PC-style DB9 connection, and not a 
traditional VAX DB9.   The tranditional VAX DB9 pinout differs.

Here's the adapter which has the wiring that's likely involved here:  
H8585-AA   http://h71000.www7.hp.com/wizard/padapters.html   Confirm 
that against a PC DB9 pinout, etc.

BN25G is a standard Ethernet cross-over cable.   So...  Wire up an 
adapter akin to H8585-AA, and things should work.   If not, then swap 
in an RJ45 straight-through patch cable.
http://h71000.www7.hp.com/wizard/cable-guide.html#BN25g


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