RE: [MLUG] Question w/ regards to Security and UM Policy, along w ith Distributed Computing

["Spurling, Shannon" <EMAIL:PROTECTED>]

But, I shouldn't. :-)
DS-0 = 64Kb Standard phone line, also 56Kb (Magic number?) if the older
framing/signaling is used
DS-1 = 1.544Mb Also known as a T1, according to the T carrier
specification. Made up of 24 DS-0 frames. 
DS-2 = 6.132Mb Not sure of any one who uses this. Made up of 4 DS-1
frames.
DS-3 = 44.736Mb Also known as a T3. Made up of 28 DS-1 channels.

now

OC-1 = 51.840Mb First level of the optical carrier standards. Made up of
1 DS-3 plus framing to ensure synchronization and timing is maintained
over the fiber.
OC-3 = 155.520Mb Lowest common optical SONET carrier. Made up of three
DS-3's
OC-12 = 622.080Mb Carries 4 OC-3's or 12 DS-3's
OC-24 = 1.244Gb 24 DS-3's
OC-48 = 2.488Gb 48 DS-3's
OC-192 = 9.953Gb 192 DS-3's

Europe uses the E carrier system. These number came off a Telcordia
chart, and may be slightly different depending on who you ask. :-)
Notice the common thread? Every thing is in multiples of DS-0's. That's
because all of these carrier technologies were designed to carry TDM'ed
(Time Division Multiplexed) phone signals between telephone CO's. 
Also, here's something to think about. When you are sending a signal
across a wire, you are either transmitting, or not. If you are using 50%
of your bandwidth, you are actually using 100% of the wire, 50% of the
time, for the period of time the measurement was made. Messes with your
head, doesn't it? :-)


Shannon Spurling
WAN Engineer -Specialist

MOREnet, Network Services, Core Network
3212 LeMone Industrial Blvd.
Columbia, MO 65201

Main:(573) 884-7200   Fax:(573)884-6673

EMAIL:PROTECTED
EMAIL:PROTECTED


-----Original Message-----
From: Brent Deterding [mailto:EMAIL:PROTECTED]
Sent: Friday, December 28, 2001 1:48 PM
To: EMAIL:PROTECTED
Subject: RE: [MLUG] Question w/ regards to Security and UM Policy, along
w ith Distributed Computing


Optical Carrier - 3, as opposed to DS-3 Digitial Signal - 3

OC3=155 Mbit over fiber
DS3=45 Mbit over copper

Now Shannon can elaborate . . .  :)

-- Brent

-----Original Message-----
From: EMAIL:PROTECTED
[mailto:EMAIL:PROTECTED]On Behalf Of Stephen
Montgomery-Smith
Sent: Friday, December 28, 2001 12:32 PM
To: EMAIL:PROTECTED
Subject: Re: [MLUG] Question w/ regards to Security and UM Policy, along
w ith Distributed Computing


What is an OC-3 ?



"Spurling, Shannon" wrote:
> 
> Mizzou? I don't know, I'm just guessing. :-) An OC-3 costs somewhere
in
> the neighborhood of $30,000 a month, I think. And that is just an
OC-3.
> Then you have equipment, space, people, charges for connectivity to an
> ISP.... It all adds up.
> I really have no idea how much any of this costs Mizzou, or any one
> else. The $30K figure is based on numbers I hear thrown around. I just
> fix it, I don't bid, buy, or pay for it.
> 
> Shannon Spurling
> WAN Engineer -Specialist
> 
> MOREnet, Network Services, Core Network
> 3212 LeMone Industrial Blvd.
> Columbia, MO 65201
> 
> Main:(573) 884-7200   Fax:(573)884-6673
> 
> EMAIL:PROTECTED
> EMAIL:PROTECTED
> 
> -----Original Message-----
> From: Ross, Matt [mailto:EMAIL:PROTECTED]
> Sent: Friday, December 28, 2001 8:20 AM
> To: EMAIL:PROTECTED
> Subject: RE: [MLUG] Question w/ regards to Security and UM Policy,
along
> w ith Distributed Computing
> 
> >    At an early stage in the proceedings, prosecutors claimed
> > that McOwen
> >    had cost the state of Georgia $415,000 in bandwidth
> > charges, based on a
> >    calculation that the distributed.net clients consumed
> > precisely 59 cents
> >    worth of bandwidth per second. The state has since backed
> > away from the
> >    $415,000 figure.
> >
> > Which is ridiculous -- 59 cents per second??!!  Why are they lying?
> > Then there is this part...
> 
> Bandwidth is expensive, but how the hell he can clog $415,000 worth of
> it is
> beyond me.
> 703389 seconds -> 8 days (plus about 3 hours).  At current bandwidth
> rates,
> that would have to be one hell of a line he tied up.  He's fully tying
> up a
> $1,529,280 per month connection for 8 days.  What university has a
> budget
> for $18,351,360 annually just to connect to the web?
> --
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-- 
Stephen Montgomery-Smith
EMAIL:PROTECTED
http://www.math.missouri.edu/~stephen
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