Hi,
I recenly bought some RJ-45 TO DB-9-M ADAPTERS from PCCABLES.COM INC. thining I could use these to convert from Token Ring to RJ-45. However, the wiring instructions on their site don't seem to work. Can anyone advise me on how to wire these little boogers so they will work properly?
Thanks! dubster3
I had always assumed that these devices had components in them to impedence match betweed the 150 ohm "IBM" cabling and the
100 ohm UTP.Whether it will ever work without the matching I don't know.
Also:- You say from "TR to RJ45". It will still be TR. Not sure if this is just slip or if you hope to convert from TR to Ethernet which needs quite a bit more than a few wires.
Shame you didn't post to comp.dcom.lans.token-ring since it has been a few years since a real message was posted. There was a homework question last month though.
I think those RJ-45 to DB-9-M are not what you think they are. Did you see anything on pccable.com to indicate that? I couldn't find any.
I think these are meant to connect Cisco console ports to PCs.
Token-Ring can run on shielded or unshielded twisted-pair (UTP). Shielded cabling used different impedance and used different connecters than UTP. The standard DB9 on the Token-Ring card is to connect to shielded or UTP depending on which "dongle" you use. The "dongle" you bought allows you to connect to UTP cabling, it does NOT convert it to Ethernet, meaning you still need a Token-Ring hub/switch to connect the device to.
Scott
Wow, why would anybody be messing with Token-Ring still?
Going from the DB9 to RJ45 token ring was more than just an adapter, there was a balun and filter in each of them.
But why are you messing with making something when token-ring media filter/adaptors are $0.99 on eBay?
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IBM still has a few mainframes here and there...
Just a thought.
And any of those bought in the last 10 years come with ethernet comms...
Neil Pike Protech Computing Ltd
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