From: Scott Morris (swm@emanon.com)
Date: Wed Mar 07 2007 - 01:20:59 ART
The expiration date on the cable? That's a new one! :)
It's all about electrical propogation and cable properties. CAT5 is a
specification, and is geared towards specific measurements within the
ethernet specs. 100 meters is the target for a drop length.
Now what happens beyond that? It depends... How clean is your building?
How well is your cable within other specs such as bend radii, EMI ranges and
other exciting things like that? IF everything is good, you can go a decent
distance further and still get signal.
But..... It still depends. It depends on the 'quantity' of traffic you are
sending. In high-volume traffic, you'll find your attainable maximum
distance to be less simply due to "noise" and interpretation issues.
Basically the short answer is that if you stay within spec, you should be
good. Outside of that, you MAY work, but you may also have intermittant
irritating problems that plague you and defy logical explanation (since most
people don't troubleshoot the physical layer these days!).
Just my thoughts for the evening...
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Digital Yemeni
Sent: Tuesday, March 06, 2007 11:14 PM
To: jhim@kornet.net; ccielab@groupstudy.com
Subject: RE: Cat. 5's distance,
Some years back when the network cabling guy used to lay Cat5 to the wiring
center that's ferther than 100 metter he sill pulls it up to 130 metters.
But when times goes on you may start to get bad signals and duplex issues
due to the "expiry date of the cable" :D
Best Regards,
Digital
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*.* You'll NEVER succeed as a "CCIE" until you LOVE Cisco MORE than your
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I've not slept for the past 5 years and I'm expected to be busy for the next
57 years + The 5 CCIEs preparation adds on that a bit. Therefore, please be
concise on your email. Thank you!
>From: "Jinhong Im" <jhim@kornet.net>
>Reply-To: "Jinhong Im" <jhim@kornet.net>
>To: <ccielab@groupstudy.com>
>Subject: Cat. 5's distance,
>Date: Wed, 7 Mar 2007 13:01:41 +0900
>
>Hello Group,
>
>Does anyone know how long can Cat.5 span and communicate without any
>repeater in the real world?
>
>
>Regards,
>
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