alt.certification.network-plus

Author

Re: csu/dsu

Russ S

2002-10-17, 11:24 pm

There are many opinions on this, but from my investigations the purpose of
the CSU/DSU is to terminate the physical link and although sometimes refered
to as a modem is not. In OSI terms, this is all layer 1 the physical
layer.

--
RussS
A+, Net+, MCP W2k

lobo422k

2002-10-18, 10:24 am

"Russ S" <noway@nohow.com> wrote in
news:JJLr9.8329$Os6.1147039@news.xtra.co.nz:

> There are many opinions on this, but from my investigations the
> purpose of the CSU/DSU is to terminate the physical link and although
> sometimes refered to as a modem is not. In OSI terms, this is all
> layer 1 the physical layer.
>
>
> --
> RussS
> A+, Net+, MCP W2k
>
>
>

Thank you

Hashem Ouaida

2002-10-28, 6:24 am

Great question

They operate at Layer 1, 2 and 3 and perhaps even 4. 1 becuase they are
physical connections with connecters and cabling. 2 they have a MAC address.
3 as they have IP's etc and 4 for the transport control like TCP, etc.

Cheers

steve harris

2002-10-28, 8:24 am

On Fri, 18 Oct 2002 02:52:10 +0000, lobo422k wrote:

> Can somebody please tell me what OSI layer the CSU/DSU operates in.

Physical layer

allen953

2002-10-31, 10:24 pm

That's a pretty busy device. I admit I don't have much experience in these
matters; however, the Larscom Split-T's we have at work aren't nearly that
fancy. Could you provide me (us) with some examples?

Thanks - AL

"Hashem Ouaida" <ouaida@optushome.com.au> wrote in message
news:3dbd2ab5$0$23171$afc38c87
@news.optusnet.com.au...
> Great question
>
> They operate at Layer 1, 2 and 3 and perhaps even 4. 1 becuase they are
> physical connections with connecters and cabling. 2 they have a MAC
address.
> 3 as they have IP's etc and 4 for the transport control like TCP, etc.
>
> Cheers
>
>

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