Robert E. Seastrom <rs@bifrost.seastrom.com> wrote:
From: Andrew Partan <asp@partan.com>
So what are you using? AC or DC? If you are not on DC, I would switch. Maybe you would have better luck.
You took the words right out of my mouth. -48vDC is *so* much cleaner and less troublesome than mains AC (or even upsed AC) that I urge all my clients to use it for *everything* whenever it's available.
Typically telco setups have about 30min-1hr of AC UPS capacity and 4-6 hrs of 48V battery capacity. Last time i was at MAE-East it didn't have any backup AC power and a nice DC setup. BTW, the cheap solution for DC hookup would be using a power inverter. --vadim
This issue of AC v DC and reliabilty of facilities is interetsting. We co-locate equipment at several telcos, and they co-locate equipment with us out west. We prefer DC wherever possible. This is because the Telcos don't depend upon anyone but themselves to provide reliable and clean power. Another way of looking at it is that if the telco goes down, then the application layers above are useless.We just received the first of several 7507s to that end....all DC. Our real problem is getting them to fit properly in 23" racks :) ===================================== George Hall 916-565-4500 SNA and Internet Network Technologies ghall@sna.com http://www.sna.com Routers and Muxes and Fiber, Oh My! =====================================
This issue of AC v DC and reliabilty of facilities is interetsting. We co-locate equipment at several telcos, and they co-locate equipment with us out west. We prefer DC wherever possible. This is because the Telcos don't depend upon anyone but themselves to provide reliable and clean power. Another way of looking at it is that if the telco goes down, then the application layers above are useless.We just received the first of several 7507s to that end....all DC.
Our real problem is getting them to fit properly in 23" racks :)
===================================== George Hall 916-565-4500
While this may not apply to 7513s, we've found that super-sturdy $25 23" or 19" rack shelves (and Greybar sells the Chatsworth sturdy shelves for $75 or so) take a 7507 or 7000 (or 7505/7010) *very* well, and there's not need to bother with the rack-harnesses. Avi
Actually, if you have the luxury of front and rear rails, the Chatsworth 23" to 19" adapter plates work quite nicely with the Cisco 7xxx series mounting kits. The plates come in a variety of sizes, but we use the ones that are about 5" if I recall that perfectly fit the hole patterns on the top and bottom of the kits. Once the whole mess is mounted in the racks, it sort of looks like the router is "suspended" in air, but I assure you it is quite sturdy as those plates don't warp/bend at all. Also, the little mounting ears that go on the router for keeping it locked in the rails work nicely with the same adapter plates. That is, mount the plates on the rails and the ears mate up with them just as they were meant to. Ed On Sun, 8 Sep 1996, Avi Freedman wrote:
This issue of AC v DC and reliabilty of facilities is interetsting. We co-locate equipment at several telcos, and they co-locate equipment with us out west. We prefer DC wherever possible. This is because the Telcos don't depend upon anyone but themselves to provide reliable and clean power. Another way of looking at it is that if the telco goes down, then the application layers above are useless.We just received the first of several 7507s to that end....all DC.
Our real problem is getting them to fit properly in 23" racks :)
===================================== George Hall 916-565-4500
While this may not apply to 7513s, we've found that super-sturdy $25 23" or 19" rack shelves (and Greybar sells the Chatsworth sturdy shelves for $75 or so) take a 7507 or 7000 (or 7505/7010) *very* well, and there's not need to bother with the rack-harnesses.
Avi
Ed Morin Northwest Nexus Inc. (206) 455-3505 (voice) Professional Internet Services edm@nwnexus.WA.COM
participants (4)
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Avi Freedman -
Ed Morin -
George Hall -
Vadim Antonov