From: EA Louie (elouie@xxxxxxxxx)
Date: Sat Dec 29 2001 - 04:43:57 GMT-3
----- Original Message -----
From: "Hotmail" <jthao1@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Friday, December 28, 2001 9:50 PM
Subject: Re: How to build a Loopback Plug for a TR-Interface`
> Do you know how to do this for the TR UTP interface?
>
> Does anybody know what the pinout is for the TR UTP port on 2523 routers?
www.cisco.com
search for token ring pinout
from the Cabling Specifications hit
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_fix/cis2500/2517/
c2517/cables.htm#20596 (watch the wrap)
>
>
> Joseph
>
>
> ----- Original Message -----
> From: "Reinhold Fischer" <Reinhold.Fischer@gmx.net>
> To: <ccielab@groupstudy.com>
> Sent: Friday, December 28, 2001 3:26 PM
> Subject: How to build a Loopback Plug for a TR-Interface`
>
>
> > Hi all,
> >
> > here is how to build a 'Loopback-Plug' so a Tokenring
> > interface on a router will come up without having to
> > connect it to a MAU or a TR-Switch:
> >
> > You need:
> > 1 pcs 9-pin male DSUB Connector (preferably with case)
> > 2 pcs resistor 4.7 kilo-Ohm
> > 2 pcs capacitor 100 nanofarad
> > 1 pcs stripe of insulation tape
> >
> > soldering iron, some solder, calm hands ;)
> >
> > 1. solder one resistor and one capacitor parallel
> > between pin 6 and pin 9 of the DSUB Connector
> >
> > 2. solder one resistor and one capacitor parallel
> > between pin 1 and pin 5 of the DSUB Connector
> >
> > 3. put some rubber tape between the capacitor/resistor pack
> > of step one and the one of step 2 so they cannot get in
> > contact with each other.
> >
> >
> >
> > +100nano+
> > | |
> > +4.7kilo+
> > _|_______|_
> > \5 4 3 2 1/
> > \9 8 7 6/
> > |-----|
> > | |
> > ++ ++
> > | |
> > +100nano+
> > | |
> > +4.7kilo+
> >
> >
> >
> > Done !
> >
> > Mail me offline if you want to have a jpg with the backview of
> > the plug. I think groupstudy would remove the attachment from the
> > mail.
> >
> >
> > Greetings !
> >
> > Reinhold, #8571
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