Thanks for the lead. Couple of good sources to answer this question
http://www.astrocorp.com/univers/introcsudsu.html - Best Illustration
http://www.alliancedatacom.com/technologies/csu-dsu/csudsu.asp
http://whatis.techtarget.com/WhatIs_Definition_Page/0,4152,211866,00.html
This is my compilation of useful links :
http://www.hotlinks.com/members/sstalib/Tech_-_Network_Resources/
"D. J. Jones" wrote:
> Just to expand in a small way on Leroy's comments, you can find them as
> external devices which connects the line to the router (or other DTE device)
> or as an internal or integrated device module which you can install directly
> on the router..dj
>
> Here is a link to a page at www.alliancedatacom.com which should provide you
> the information you need to get a better understanding of what a CSU/DSU is
> and how it works as well as a couple of tutorials. No flames please, I do
> not have a relationship with Alliancedatacom.
>
> Hope this helps
>
> "Leroy Burns" <[EMAIL PROTECTED]> wrote in message
> C734BD865F91D3118383009027DE092242B5DF@EXCHANGE2">news:C734BD865F91D3118383009027DE092242B5DF@EXCHANGE2...
> > CSU/DSU
> > stands for Channel Service Unit/Data Service Unit. This is the device
> > connected to the incoming data communications line, usually a T1 or
> > Fractional T1 line.
> >
> > Leroy
> > -----Original Message-----
> > From: Bradley J. Wilson [mailto:[EMAIL PROTECTED]]
> > Sent: Friday, December 22, 2000 8:14 AM
> > To: cisco
> > Subject: Re: what is a CSU/DSU?
> >
> > Folks, is it really necessary to pounce on someone for asking an
> occasional
> > "simple" question? Okay, so CSU/DSUs are basic networking gear. But
> guess
> > what: *none* of the CCNA material I studied ever went into any great
> detail
> > on what exactly this thing was or did, and coming from the technical
> > training side of the house never dealt with one until very recently.
> Other
> > examples: I have no idea what a "punch-down block" or a "patch panel" is.
> > Maybe I've dealt with them before and would know if someone said "*That*
> is
> > a patch panel," but the fact is that most of the CC** materials only focus
> > on the routers and switches, and not so much on the peripheral yet
> essential
> > devices.
> >
> > So, in other words, back off when someone asks a question you think is
> > "beneath" you or this group. Just don't answer if you don't want to. But
> > there are lots of valid, basic questions out there that yes, even CCNP/IE
> > candidates would like answers to. It would be a shame if they felt they
> > weren't "allowed" to ask those questions here.
> >
> > Sincerely,
> >
> > Bradley J. Wilson
> > Who, despite being a CCNA, CCDA, MCSE, CNX-A, NNCSS, MCT and CTT, does not
> > know what a punch-down block is. Sue me.
> >
> >
> > ----- Original Message -----
> > From: netlinesys
> > Newsgroups: groupstudy.cisco
> > To: [EMAIL PROTECTED]
> > Sent: Friday, December 22, 2000 7:55 AM
> > Subject: re: what is a CSU/DSU?
> >
> >
> > Zhiping,
> >
> > If u know the basic of networking , u can answer this question !!??
> > I found it difficult for CCNP candidate to ask this question.
> >
> > ----- Original Message -----
> > From: "Zhiping Li" <[EMAIL PROTECTED]>
> > Newsgroups: groupstudy.cisco
> > Sent: Friday, December 22, 2000 12:37 PM
> > Subject: what is a CSU/DSU?
> >
> >
> > > Hi,ciscoer:
> > >
> > > when I study cisco ccnp,
> > > I always find CSU/DSU,
> > > what are them?
> > > what are their use?
> > > Are they some kind of MODEM?
> > > thanks .
> > >
> >
> >
> >
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