adamtech78
join:2006-01-25
Chicago, IL
| old school telephone equipment photos
photos taken from "Ever seen the insides of a LARGE metropolitan telephone switching center (vintage)? "
»www.camaroz28.com/forums/showthr···t=718548
thread
»i59.photobucket.com/albums/g293/···fice.jpg
»i59.photobucket.com/albums/g293/···fice.jpg
»i59.photobucket.com/albums/g293/···fice.jpg
»i59.photobucket.com/albums/g293/···fice.jpg
»i59.photobucket.com/albums/g293/···fice.jpg
»i59.photobucket.com/albums/g293/···fice.jpg |
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mikebb278
join:2002-06-17
Cincinnati, OH | Ironicly nothing looks much different from the first 4 pictures in todays offices. |
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TomS_
debugger it
Premium,MVM
join:2002-07-19
Australia
| said by mikebb278  :Ironicly nothing looks much different from the first 4 pictures in todays offices. Probably because the only thing that really ever changes is the technology that plugs into the end of it. And that is usually only driven by the need to fit more of it in, offer more features/services, etc.
Gradually it will all disappear as fibre and wireless takes over as the next generation of last mile.
Soon the only major facilities you will find will be aggregation centres where all of the smaller nodes and wireless towers are aggregated and traffic switched amongst them or trunked off to another one in a distant land. And they wont be as impressive, just masses of optical fibre into a "couple" of racks worth of gear compared to these older behemoths.  |
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weaseled386
join:2008-04-13
Port Orange, FL
 ·Verizon Wireless B..
 ·Bright House
| reply to adamtech78
Yeah, the first couple are still spot-on. I don't work in the cable vaults, but I've walked thru them. Although they still look some-what like that, the cables are just smaller. They're a lot neater with a few dozen fibers coming in vs. a couple hundred 1200 pairs!
The blue/white pairs are just cross connects. They connect the field (vertical blocks) to the equipment (horizontal) blocks. Some are POTS, some are various alarms, etc.
The overhead rack is still 100% like that. Each cable has to be laid neatly over the next, and stitched at predetermined intervals. The stitching distance depends on what type of cable it is, and often times a fiber/fish paper will protect the cable at certain points. Also, a 9-ply waxed cord is used... and you have to use specific knots at specific points. The cord is doubled back onto itself to start. If the cord crosses itself on the bottom tier of the cable rack it's a defect. If you fail to use a specific lacing method, defect. EVERY defect has to be corrected before a job can close! |
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