about the closest thing I can think of is an Apple LocalTalk to
Ethernet bridge. These are cigarette-pack-sized and around
$100. Do note that these are bridges, not physical converters.
But there's also a visible requirement for them, which, in
turn, means the market will respond. One of the things that
comes with experience is having a sense of what realistically
is available and affordable, and when it just doesn't make sense
to spend the effort on searching.
At 10:03 AM 3/22/2001 -0700, you wrote:
>I suppose we were making it more difficult than it needed to be. If you
>were simply asking if it exists, then the answer is yes. It's called a
>router. <g> There is no simple interface converter alone that can
>handle all the issues. Something with more intelligence is necessary.
>
> >>> "Neil Schneider" <[EMAIL PROTECTED]> 3/22/01 9:48:07
>AM >>>
> I agree with you about the issues. I wasn't ever asking a question
>about
>how the technologies worked, just whether anyone had heard or seen of
>such a
>device. Again, I am not saying it would make sense, just whether it
>exists.
>
>Neil
>
>
>
>-----Original Message-----
>From: John Neiberger
>To: [EMAIL PROTECTED]
>Cc: [EMAIL PROTECTED]
>Sent: 3/22/01 11:28 AM
>Subject: Re: RJ45 ethernet to cisco Serial conversion?
>
>There are two separate issues that need to be dealt with to accomplish
>your goal. First you need to deal with the physical issue, which in a
>way is what that bridging device does for you. It allows you to place
>ethernet data onto a WAN link, but it also requires the same device to
>be on the other end of the link to convert this serialized-ethernet to
>standard ethernet. This is just bridging, not true media conversion.
>
>There are yet other physical issues like clocking and encoding. A
>synchronous serial link places bits on the wire in a way that would be
>completely incomprehensible to an ethernet speaker and vice versa. To
>handle the clocking issue you certainly would need a device that can
>provide clocking for the serial port, which that bridging unit does.
>
>The second issue is the datalink encapsulation. In ethernet, you're
>using Ethernet v2 or 802.3 frames as your encapsulation, whereas the
>serial link is using either HDLC, PPP, or frame relay. Again, these
>are
>so much different than ethernet that it requires some intelligence to
>convert between them.
>
>This is why a router is necessary and no simple converter can handle
>it. A two-port router would be needed to successfully accomplish this
>task. I think that is why Priscilla pointed you to that link.
>Instead
>of answering the question outright, she pointed you to material
>that--upon digestion--would lead to the answer.
>
>HTH,
>John
>
> >>> "Neil Schneider" <[EMAIL PROTECTED]> 3/22/01 9:06:57
>AM >>>
>Priscilla,
>
>I usually look forward to your posts, but I think you are way off
>base
>with
>this response. Pointing to the cisco page describing different
>technologies
>does absolutely nothing to answer my original question. I also relize
>that
>a converter/transiever such as this would have limited use in a real
>world
>situation, but that certainly does not mean it doesnt exist.
>Obvoiusly we can move data between ethernet and serial, that is what
>is
>being done in the router itself, so your train/bus senario is
>meaningless.
>What I was looking for was an external device that can do this without
>resorting to using another router such as -->>
>
>ethernet -->routerA rj45 ----routerA serial --->routerB serial
>----routerB
>rj45--->ethernet
>
>I want to do:
>
>ehternet ---> external converter ---->routerA serial---routerA
>rj45 --->ethernet
>
>Neil Schneider
>
>
>
>
>Priscilla Oppenheimer <[EMAIL PROTECTED]> wrote in message
>[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > The question doesn't even make sense. It would be like asking "what
>could
>I
> > use to convert a train station to a bus station?"
> >
> > Read the document.
> >
> > http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/index.htm
> >
> > Priscilla
> >
> > At 10:19 AM 3/22/01, you wrote:
> > >whoever comes up with the converter will be rich...
> > >
> > >-----Original Message-----
> > >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf
>Of
> > >Priscilla Oppenheimer
> > >Sent: Thursday, March 22, 2001 9:29 AM
> > >To: [EMAIL PROTECTED]
> > >Subject: RE: RJ45 ethernet to cisco Serial conversion?
> > >
> > >
> > >At 12:27 AM 3/22/01, Lim Jit Cheng wrote:
> > > >it's not all gone...... there is such converter....
> > > >
> > > >http://www.lanode.com/tier2/et10.htm
> > >
> > >That's not a converter. It's a bridge.
> > >
> > >Here's a good document to help you and the person who asked the
>original
> > >question:
> > >
> > >http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/index.htm
> > >
> > >Priscilla
> > >
> > >
> > >
> > >
> > > >i wonder how much is the price.. i am interested too.....
> > > >
> > > >
> > > >-----Original Message-----
> > > >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
>Behalf Of
> > > >John Neiberger
> > > >Sent: Wednesday, March 21, 2001 11:51 PM
> > > >To: [EMAIL PROTECTED]
> > > >Cc: [EMAIL PROTECTED]
> > > >Subject: Re: RJ45 ethernet to cisco Serial conversion?
> > > >
> > > >
> > > >There is no way to connect an ethernet interface to a serial
>interface,
> > > >they are entirely different technologies. Your only option would
>be to
> > > >add another router to do the media conversion.
> > > >
> > > >Or, you could buy a hub/switch and use that to connect the dsl
>router,
> > > >the lan, and your 2501. However, that's not the greatest
>solution
>and
> > > >it doesn't really accomplish your goal.
> > > >
> > > >HTH,
> > > >John
> > > >
> > > > >>> "Neil Schneider" <[EMAIL PROTECTED]> 3/21/01
>8:28:06
> > > >AM >>>
> > > >I want to be able to plug my DSL modem into the serial port on my
> > > >2501,
> > > >leaving the ethernet port available for my lan. Does anyone know
>of a
> > > >converter/transiever that will allow me to do this?
> > > >Thanks in advance.
> > > >
> > > >Neil
> > > >
> > > >
> > > >_________________________________
> > > >FAQ, list archives, and subscription info:
> > > >http://www.groupstudy.com/list/cisco.html
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>[EMAIL PROTECTED]
> > > >
> > > >
> > > >
> > > >_________________________________
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>[EMAIL PROTECTED]
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> > > >_________________________________
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> > > >http://www.groupstudy.com/list/cisco.html
> > > >Report misconduct and Nondisclosure violations to
>[EMAIL PROTECTED]
> > >
> > >
> > >________________________
> > >
> > >Priscilla Oppenheimer
> > >http://www.priscilla.com
> > >
> > >_________________________________
> > >FAQ, list archives, and subscription info:
> > >http://www.groupstudy.com/list/cisco.html
> > >Report misconduct and Nondisclosure violations to
>[EMAIL PROTECTED]
> >
> >
> > ________________________
> >
> > Priscilla Oppenheimer
> > http://www.priscilla.com
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
> > Report misconduct and Nondisclosure violations to
>[EMAIL PROTECTED]
> >
>
>
>_________________________________
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>
>
>
>
>
>_________________________________
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>http://www.groupstudy.com/list/cisco.html
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