nanog mailing list archives
Re: Rack rails on network equipment
From: Joe Greco <jgreco () ns sol net>
Date: Sat, 25 Sep 2021 18:52:18 -0500
On Sat, Sep 25, 2021 at 04:23:38PM -0700, Jay Hennigan wrote:
On 9/25/21 16:14, George Herbert wrote:(Crying, thinking about racks and racks and racks of AT&T 56k modems strapped to shelves above PM-2E-30s???)And all of their wall-warts [...]
You were doing it wrong, then. :-) ExecPC had this down to a science, and had used a large transformer to power a busbar along the back of two 60-slot literature organizers, with 4x PM2E30's on top, a modem in each slot, and they snipped off the wall warts, using the supplied cable for power. A vertical board was added over the top so that the rears of the PM2s were exposed, and the board provided a mounting point for an ethernet hub and three Amp RJ21 breakouts. This gave you a modem "pod" that held 120 USR Courier 56K modems, neatly cabled and easily serviced. The only thing coming to each of these racks was 3x AMP RJ21, 1x power, and 1x ethernet. They had ten of these handling their 1200 (one thousand two hundred!) modems before it got unmanageable, and part of that was that US Robotics offered a deal that allowed them to be a testing site for Total Control. At which point they promptly had a guy solder all the wall warts back on to the power leads and proceeded to sell them at a good percentage of original price to new Internet users. The other problem was that they were getting near two full DS3's worth of analog lines being delivered this way, and it was taking up a TON of space. A full "pod" could be reduced to 3x USR TC's, so two whole pods could be replaced with a single rack of gear. ... JG -- Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net "The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge.'"-Asimov
Current thread:
- Re: Rack rails on network equipment, (continued)
- Re: Rack rails on network equipment Lady Benjamin Cannon (Sep 26)
- Re: Rack rails on network equipment richey goldberg (Sep 24)
- RE: Rack rails on network equipment Kevin Menzel via NANOG (Sep 24)
- Re: Rack rails on network equipment Doug McIntyre (Sep 24)
- Re: Rack rails on network equipment Joe Greco (Sep 24)
- Re: Rack rails on network equipment George Herbert (Sep 24)
- Re: Rack rails on network equipment Joe Maimon (Sep 24)
- Re: Rack rails on network equipment Wayne Bouchard (Sep 24)
- Re: Rack rails on network equipment George Herbert (Sep 25)
- Re: Rack rails on network equipment Jay Hennigan (Sep 25)
- Re: Rack rails on network equipment Joe Greco (Sep 25)
- Re: Rack rails on network equipment William Allen Simpson (Sep 27)
- Re: Rack rails on network equipment Doug McIntyre (Sep 27)
- Re: Rack rails on network equipment George Herbert (Sep 25)
- Re: Rack rails on network equipment Baldur Norddahl (Sep 25)
- Re: Rack rails on network equipment Jay Hennigan (Sep 25)
- Re: Rack rails on network equipment Michael Thomas (Sep 25)
- Re: Rack rails on network equipment Shawn L via NANOG (Sep 25)