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Category Archive for 'Uncategorized'

Cisco IR809 DC power connector

If you find yourself with some Cisco IR809G and probably other Cisco IR800-series industrial integrated services routers from eBay, you probably find yourself needing the DC power plug/connector. It took me a while to find these as the Cisco part number is useless in the 3rd party world. Mouser lists them as “Pluggable Terminal Blocks […]

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I’ve been tinkering around with other vintage projects the last several months. Many of the photos land over on Flickr but I’m pretty sure the googles never index them, so they’re largely undiscovered and I haven’t written widely about them and why I care. So here’s my “life story before the recipe” list.   Logitech […]

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TIL a DHCPv4 server can respond with two different TFTP boot-file-names in a single DHCPOFFER packet. And how the second filename can get corrupted with extra junk that shows up as a PXE client trying to download a slightly wrong file from your TFTP server. The latter I’ve seen before but I don’t think I […]

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Years behind schedule I finally got around to replacing ISC DHCP with Kea DHCP so I could finally have proper IPv6 host reservations. What I just learned, and should have learned years ago, that several of my motherboards such as the Supermicro A1SAi and Intel NUC while they support UEFI PXE booting, they do not […]

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Vintage dial-up modem teardowns

[photos: flickr – Vintage dial-up modem teardowns] [photos: flickr – Analog telephone adapters] For several months I’ve been buying old popular models of dial-up modems from the 1990s to test how they fare over VoIP connections along with different analog telephone adapters. To my great annoyance maybe a quarter of them didn’t include an AC […]

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Petcube Bites 2.0 teardown

This is my second Petcube Bites and after a few years of operation it stopped dispensing treats. Treats started getting jammed between the rotating loader head thingy and the slot loading to the launcher chute and I’d have to empty it out and pick out the offending treat, only to have it jam the next […]

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Here’s one for the future troubleshooting seekers. I was testing IPv4 UEFI PXE booting a Supermicro A1SAi motherboard after applying the Atom 2550 fix and couldn’t get the thing to load the network bootstrap program (NBP). I’m not at all saying this is the only reason for hitting a PXE-E99 error, this is just what […]

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This is part of the project to connect my Wildcat! BBS to a retro X.25 network, but it also applies more broadly to “reverse telnet” operation of a Cisco router where you telnet/ssh to a router at a given port to access a serial device hanging off of the aux or a terminal line. I […]

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I was recently expanding my analog voice empire and noticed my Cisco ATA191 was blinking like it was rebooting, and coming back. Looking at logs it was indeed warm rebooting and SIP re-registering every few minutes. I ruled out a duplicate IP address, and it never missed a ping. I was wondering if the VoIP […]

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Many years ago I was out of the country turning up a new site. Along with racks of servers we had a pair of cabinets shipped to us that contained Cisco 6509s, patch panels, with 300+ ports pre-mounted, pre-cabled, and tested from our main US site. This was a weeks long project and we were […]

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