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Joined: Aug 2004
Posts: 1,745 Likes: 49
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Joined: Aug 2004
Posts: 1,745 Likes: 49 |
What's the consensus out there for installing the crossover between two data switches that utilize a fibre tie cable?
I've always seen (and done it this way myself) that the tie cable is NOT crossed over at the patch panels. There would be ONE crossover patch cable in this case.
Recently, someone told me that the standard is to actually cross the pairs inside the patch panel.
Thoughts?
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Joined: Jun 2007
Posts: 83
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Joined: Jun 2007
Posts: 83 |
Do the crossover with a jumper.
I make it a point never to mess with any of the structured cabling (copper and fiber). Any special connections, do whatever it takes not to touch behind the jack/bulkhead. This way, the next person should be able to just plug and play.
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Joined: Aug 2003
Posts: 5,155 Likes: 5
Moderator-Vertical, Vodavi
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Moderator-Vertical, Vodavi
Joined: Aug 2003
Posts: 5,155 Likes: 5 |
We always cross the fibers in the tray.
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Joined: May 2007
Posts: 5,059 Likes: 6
Moderator-1A2, Cabling
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Moderator-1A2, Cabling
Joined: May 2007
Posts: 5,059 Likes: 6 |
ALWAYS cross over with a jumper(s). Anything else is stupid, heretical, amateurish and........
I'm so mad to read this that I'm sputtering. i've run out of adjectives to describe this lunatic behavior.
Sam
"Where are we going and why are we in this hand basket?"
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Joined: Aug 2003
Posts: 5,155 Likes: 5
Moderator-Vertical, Vodavi
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Moderator-Vertical, Vodavi
Joined: Aug 2003
Posts: 5,155 Likes: 5 |
Well Sam, we just do it the way BICSI taught. Since I respect your opinion, I just double-checked the TDMM 11 and it shows the fibers being reversed in the tray. I ordered the TDMM 12 last week and will check once it comes in.
-Larry
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Joined: Jan 2009
Posts: 854 Likes: 1
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Joined: Jan 2009
Posts: 854 Likes: 1 |
Lately, we have been using bi-directional SFP's in alot of our gear. Tx on one wavelength, Rx on another...all on one fiber strand. That way, you do not need to worry about cross-overs and it saves your fiber count.
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Joined: Jan 2002
Posts: 2,328
Moderator-Comdial
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Moderator-Comdial
Joined: Jan 2002
Posts: 2,328 |
I'm with Larry on this. We've always put our reverses in the master room. Logic being is the master room controls everything. In the ST days, it didn't matter and everything could be straight and you could just flip the patch cord.
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Joined: Feb 2006
Posts: 409
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Posts: 409 |
We always "cross" our LC pairs on the cable too. The color code is still intact but on one end the clip is to the left but the other is to the right. This eliminates the customer from keeping track of different polarity of patch cords.
-Todd
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Joined: May 2007
Posts: 5,059 Likes: 6
Moderator-1A2, Cabling
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Moderator-1A2, Cabling
Joined: May 2007
Posts: 5,059 Likes: 6 |
I give up. I've obviously either lived too long or have been out of the industry for too long.
Enjoy. Do what you like. Pay no attention to the doddering old man behind the curtain.
Sam
"Where are we going and why are we in this hand basket?"
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Joined: Feb 2005
Posts: 12,354 Likes: 4
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Joined: Feb 2005
Posts: 12,354 Likes: 4 |
Geeze, how can you argue with BICSI Sam?  -Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
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