Re: Packet delivery on a Ethernet Wire

Joe,

Have a look at the following link:

http://pinouts.ru/Net/poe_pinout.shtml

There is a Wiring Certification just like CCIE it's called BICSI, if you are
interested get one of their courseware and go through it, you will learn a
ridiculous amount of stuff, from pinouts all the way to wiring design.

On Sun, Jul 31, 2011 at 12:13 PM, Joe Astorino <joeastorino1982_at_gmail.com>wrote:

> There is no problem, I just don't understand enough about it to understand
> how it is possible and I am curious. I wonder how the data encoding is
> separated from the power. Reading about PAM-5 modulation used on
> GigabitEthernet over UTP right now, and it is quite fascinating
>
> On Sun, Jul 31, 2011 at 3:11 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar
> >wrote:
>
> > POE uses the same wires for data and power in 100Base-T,
> > what's the problem ?
> >
> >
> > Joe Astorino @ 31/07/2011 15:47 -0300 dixit:
> >
> >> If all 4 pairs are used in 1000Base-T I wonder how POE also rolls into
> >> that...
> >>
> >> On Sun, Jul 31, 2011 at 1:55 PM, Carlos G Mendioroz <tron_at_huapi.ba.ar
> <mailto:
> >> tron_at_huapi.ba.ar>> wrote:
> >>
> >> On 1G 1000BASE-T, pairs are bidirectional, full duplex.
> >> (Like your POTS phone line, you can talk while you listen)
> >> No collisions.
> >> Signal treatment is beyong my current understanding, but it uses 5
> >> levels in each pair!
> >> Amazing...
> >>
> >>
> >> Irfan Sid @ 31/07/2011 11:32 -0300 dixit:
> >>
> >> On 1 Gig link pin 4,5, 7 and 8 are bi-directional
> >> meaning the
> >> same wire will be used for Tx and Rx?
> >> And for 10/100 those pins are not used at all, so 10/100 is
> >> serial rather then parrallel.
> >> Does that mean that odd collison is possible on both since they
> >> are bidirectional packet streams??
> >>
> >> http://pinouts.ws/rj-45-__**pinout.html<
> http://pinouts.ws/rj-45-__pinout.html>
> >> <http://pinouts.ws/rj-45-**pinout.html<
> http://pinouts.ws/rj-45-pinout.html>
> >> >
> >>
> >> http://pinouts.ru/Net/__**Ethernet10BaseT_pinout.shtml<
> http://pinouts.ru/Net/__Ethernet10BaseT_pinout.shtml>
> >> <http://pinouts.ru/Net/**Ethernet10BaseT_pinout.shtml<
> http://pinouts.ru/Net/Ethernet10BaseT_pinout.shtml>
> >> >
> >>
> >>
> >>
> >> On Sun, Jul 31, 2011 at 2:50 PM, Carlos G Mendioroz
> >> <tron_at_huapi.ba.ar <mailto:tron_at_huapi.ba.ar>
> >> <mailto:tron_at_huapi.ba.ar <mailto:tron_at_huapi.ba.ar>>> wrote:
> >>
> >> I stand corrected, in 1000BASE-T there are 4 bidirectional
> >> signal paths,
> >> so it's basically a parallel interface.
> >>
> >> Sorry about that.
> >> -Carlos
> >>
> >> Aaron Riemer @ 31/07/2011 05:36 -0300 dixit:
> >>
> >> Yep. However just doing some reading it looks like
> >> Gigabit copper
> >> (1000BaseT) uses all four pairs and this link seems to
> >> suggest
> >> that data is
> >> sent in parallel.
> >> http://www.cisco.com/en/US/___**
> >> _tech/tk389/tk214/tech_____**digest09186a0080091a86.html<
> http://www.cisco.com/en/US/____tech/tk389/tk214/tech_____digest09186a0080091a86.html
> >
> >> <http://www.cisco.com/en/US/__**tech/tk389/tk214/tech___**
> >> digest09186a0080091a86.html<
> http://www.cisco.com/en/US/__tech/tk389/tk214/tech___digest09186a0080091a86.html
> >
> >> >
> >> <http://www.cisco.com/en/US/__**
> >> tech/tk389/tk214/tech___**digest09186a0080091a86.html<
> http://www.cisco.com/en/US/__tech/tk389/tk214/tech___digest09186a0080091a86.html
> >
> >> <http://www.cisco.com/en/US/**tech/tk389/tk214/tech_**
> >> digest09186a0080091a86.html<
> http://www.cisco.com/en/US/tech/tk389/tk214/tech_digest09186a0080091a86.html
> >
> >> >>
> >>
> >> "1000BASE-T works by using all four of the Category 5
> >> pairs to
> >> achieve 1000
> >> Mbps operation over the installed Category 5 copper
> cabling.
> >> 1000 Mbps data
> >> rates are achieved by sending and receiving a 250 Mbps
> data
> >> stream over each
> >> of the four pairs simultaneously (4 X 250 Mbps = 1 Gbps)."
> >>
> >>
> >>
> >> Cheers,
> >>
> >> -Aaron.
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com> <mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>**>
> >> [mailto:nobody_at_groupstudy.com
> >>
> >> <mailto:nobody_at_groupstudy.com> <mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>**>__] On
> >>
> >> Behalf Of
> >> Irfan Sid
> >> Sent: Sunday, 31 July 2011 1:02 PM
> >> To: Aaron Riemer
> >> Cc: Carlos G Mendioroz; Cisco certification; Cisco
> >> certification
> >> Subject: Re: Packet delivery on a Ethernet Wire
> >>
> >> So does that mean that in copper wire, you have two paths
> ie
> >> full duplex,
> >> one for transmit and one for recieve. One pair of the
> >> copper will be
> >> dedicated to tansmit and one to recieve. Each path
> >> transmitting
> >> serially.
> >>
> >> On Fibre its the same, you have two fibre's one for
> >> transmit and
> >> one for
> >> receive and data is transmitted serially on them.
> >>
> >> Is this correct?
> >>
> >> On Thu, Jul 28, 2011 at 6:07 AM, Aaron Riemer
> >> <ariemer_at_amnet.net.au <mailto:ariemer_at_amnet.net.au>
> >> <mailto:ariemer_at_amnet.net.au <mailto:ariemer_at_amnet.net.au>>**>
> >> wrote:
> >>
> >> My apologies. I must have misread.
> >>
> >> http://en.wikipedia.org/wiki/_**___Data_transmission<
> http://en.wikipedia.org/wiki/____Data_transmission>
> >> <http://en.wikipedia.org/wiki/**__Data_transmission<
> http://en.wikipedia.org/wiki/__Data_transmission>
> >> >
> >> <http://en.wikipedia.org/wiki/**__Data_transmission<
> http://en.wikipedia.org/wiki/__Data_transmission>
> >> <http://en.wikipedia.org/wiki/**Data_transmission<
> http://en.wikipedia.org/wiki/Data_transmission>
> >> >>
> >>
> >> Thanks for clearing that up.
> >>
> >> Cheers,
> >>
> >> -Aaron.
> >>
> >> -----Original Message-----
> >> From: nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com> <mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>**>
> >> [mailto:nobody_at_groupstudy.com
> >>
> >> <mailto:nobody_at_groupstudy.com>
> >>
> >> <mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>**>__] On Behalf Of
> >> Carlos G Mendioroz
> >> Sent: Thursday, 28 July 2011 12:27 AM
> >> To: Aaron Riemer
> >> Cc: 'Irfan Sid'; 'Cisco certification'; 'Cisco
> >> certification'
> >> Subject: Re: Packet delivery on a Ethernet Wire
> >>
> >> Aaron,
> >> copper has "pairs" because you use one wire as a
> >> reference
> >> to the other.
> >> But there is only one signal path (each way), and it
> >> works
> >> serially.
> >> -Carlos
> >>
> >> Aaron Riemer @ 27/7/2011 4:09 -0300 dixit:
> >>
> >> Hi Irfan,
> >>
> >> I believe with copper Ethernet (100BaseTX for
> >> example)
> >> since there are
> >> copper "pairs" the data is sent in parallel. I
> would
> >> assume the only way
> >> parallel data transmission would work with fibre
> >> is if a
> >> different band
> >>
> >> of
> >>
> >> light is used (CWDM for example).
> >>
> >> Queuing on the router/switch only affects packets
> >> within
> >> the router
> >>
> >> itself
> >>
> >> and has no bearing on packets along the wire
> (unless
> >> they are dropped).
> >>
> >> Tools such as compression / LFI / DSCP marking are
> >> examples of the
> >>
> >> router
> >>
> >> manipulating the packets in some way before
> >> transmission
> >> out an
> >>
> >> interface.
> >>
> >> Cheers,
> >>
> >> -Aaron.
> >>
> >>
> >> -----Original Message-----
> >> From: nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>
> >> <mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>**>
> >> [mailto:nobody_at_groupstudy.com
> >>
> >> <mailto:nobody_at_groupstudy.com>
> >>
> >> <mailto:nobody_at_groupstudy.com
> >> <mailto:nobody_at_groupstudy.com>**>__] On Behalf Of
> >> Irfan Sid
> >> Sent: Wednesday, 27 July 2011 1:48 PM
> >> To: Cisco certification; Cisco certification
> >> Subject: Packet delivery on a Ethernet Wire
> >>
> >> This maybe a stupid question would appreciate if
> >> someone
> >> can clearify:
> >>
> >> Are Ethernet packets delivered serially on the
> >> physcial
> >> medium ie copper
> >>
> >> or
> >>
> >> fibre - one after another in one single file or
> >> line if
> >> you will. Or are
> >> they delivered in parallel ie. two or more
> >> packets can be in
> >>
> >> transmission
> >>
> >> along each other in parallel.
> >>
> >> Also when you enable queueing on Router/switch.
> >> Does
> >> this only effect
> >>
> >> the
> >>
> >> behaviour of how the router treats the packet on
> the
> >> inbound or outbound
> >> interface or does it also effect the behaviour of
> >> the
> >> packet when it is
> >> actually in transit on the wire itself.
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >> <http://www.ccie.net/>
> >>
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> >> >
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> http://www.groupstudy.com/__list/CCIELab.html>
> >> <http://www.groupstudy.com/**list/CCIELab.html<
> http://www.groupstudy.com/list/CCIELab.html>
> >> >>
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >> <http://www.ccie.net/>
> >>
> >> ______________________________**
> >> ______________________________**___________________
> >> Subscription information may be found at:
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> >> <http://www.groupstudy.com/__**list/CCIELab.html<
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> >> >
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> >> <http://www.groupstudy.com/**list/CCIELab.html<
> http://www.groupstudy.com/list/CCIELab.html>
> >> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> Carlos G Mendioroz <tron_at_huapi.ba.ar
> >> <mailto:tron_at_huapi.ba.ar>
> >> <mailto:tron_at_huapi.ba.ar <mailto:tron_at_huapi.ba.ar>>>
> >>
> >> LW7 EQI Argentina
> >>
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >> <http://www.ccie.net/>
> >>
> >> ______________________________**
> >> ______________________________**___________________
> >> Subscription information may be found at:
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> >> <http://www.groupstudy.com/__**list/CCIELab.html<
> http://www.groupstudy.com/__list/CCIELab.html>
> >> >
> >> <http://www.groupstudy.com/__**list/CCIELab.html<
> http://www.groupstudy.com/__list/CCIELab.html>
> >> <http://www.groupstudy.com/**list/CCIELab.html<
> http://www.groupstudy.com/list/CCIELab.html>
> >> >>
> >>
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >> <http://www.ccie.net/>
> >>
> >> ______________________________**
> >> ______________________________**___________________
> >> Subscription information may be found at:
> >> http://www.groupstudy.com/____**list/CCIELab.html<
> http://www.groupstudy.com/____list/CCIELab.html>
> >> <http://www.groupstudy.com/__**list/CCIELab.html<
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> >> >
> >> <http://www.groupstudy.com/__**list/CCIELab.html<
> http://www.groupstudy.com/__list/CCIELab.html>
> >> <http://www.groupstudy.com/**list/CCIELab.html<
> http://www.groupstudy.com/list/CCIELab.html>
> >> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> -- Carlos G Mendioroz <tron_at_huapi.ba.ar
> >> <mailto:tron_at_huapi.ba.ar> <mailto:tron_at_huapi.ba.ar
> >>
> >> <mailto:tron_at_huapi.ba.ar>>>
> >> LW7 EQI Argentina
> >>
> >>
> >>
> >> -- Carlos G Mendioroz <tron_at_huapi.ba.ar <mailto:
> tron_at_huapi.ba.ar
> >> >>
> >>
> >> LW7 EQI Argentina
> >>
> >>
> >> Blogs and organic groups at http://www.ccie.net
> >>
> >> ______________________________**______________________________**
> >> _______________
> >> Subscription information may be found at:
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> http://www.groupstudy.com/list/CCIELab.html>
> >> >
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> --
> >> Regards,
> >>
> >> Joe Astorino
> >> CCIE #24347
> >> Blog: http://astorinonetworks.com
> >>
> >> "He not busy being born is busy dying" - Dylan
> >>
> >>
> > --
> > Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
> >
>
>
>
> --
> Regards,
>
> Joe Astorino
> CCIE #24347
> Blog: http://astorinonetworks.com
>
> "He not busy being born is busy dying" - Dylan
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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>
>
>
>
>
>
>

-- 
*Narbik Kocharians
*CCSI#30832, CCIE# 12410 (R&S, SP, Security)
www.MicronicsTraining.com <http://www.micronicstraining.com/>
Sr. Technical Instructor
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