On 10/29/2013 10:20 AM, Gino Villarini wrote:
Then I have to add a switch and ups on each floor... I was thinking of
home running all to the top floor... no?
How big is each floor? This may be a case where exact mapping of the
route matters.
Cat5e at 100 Mbps is rated for 100 meters maximum between actives. In
practice it often works farther but it's not good practice to risk it in
this sort of installation. It comes in 4-pair (drop), 25-pair, and
100-pair cables. The total length includes, then, any vertical risers
(25 or 100 pairs), any horizontal pulls (probably 4-pair), and any
connecting cords.
A 15-story building means the vertical distance alone, to the farthest
closet, uses up about half the total budget. Then add in the stuff on
each floor. If it's a small, tall building, like some cramped hotels
I've stayed in in New York ;-) , then it still might work if it's all
home run.
Otherwise, you probably need more than one switch. You might put the
hub switch in the main room and run 25-pair or 100-pair to panels on
nearby floors, depending on the unit count, and then light tributary
switches on more distant floors, each serving a few nearby floors. I
would not however daisy-chain anything. Two levels of switch, hub and
floor, tops. And while managed switches cost more, they're probably
worth it if you're going to have to maintain this, to reduce truck rolls.
*From:*wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org]
*On Behalf Of *Sam Tetherow
*Sent:* Tuesday, October 29, 2013 10:13 AM
*To:* WISPA General List
*Subject:* Re: [WISPA] MDU wiring
Switch on each floor, cat5e to each unit. If you have the ability,
wire each floor back to the telco room on the roof, otherwise you
could 'daisy-chain' each floor to the one above it back to the roof.
Second option has a lot more points of failure though.
On 10/29/2013 09:05 AM, Gino Villarini wrote:
Given the following scenario:
New MDU , 15 floors, telco room on top, telco closet on each floor
with conduit to each Unit... what would be the cheapest way to
wire this for Cat5 Ethernet?
Gino A. Villarini
g...@aeronetpr.com <mailto:g...@aeronetpr.com>
Aeronet Wireless Broadband Corp.
787.273.4143
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Fred R. Goldstein k1io fred "at" interisle.net
Interisle Consulting Group
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