Tag: ModemManager
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Make a Pluggable USB3-HUB7BC always-on
The Pluggable USB3-HUB7BC is an older USB3 hub with a special property: all seven ports are software controllable with uhubctl. It’s been replaced by a USB-C version that has fewer controllable ports, but you can still find the OG on eBay. Controllable ports are critical for modem testing to ensure only one of multiple attached…
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Nokia FW2IRA -> ?
Today I’m converting my Nokia Flexi Zone Multiband Indoor Pico BTS model FW2IRA to use external antennas. It’s a 2×2 LTE band 66+46 eNodeB about the size of a couple dinner plates stacked up. I need external antennas because, like my previous conversion of a Nokia FWFF, I’m going to pipe the radios into a…
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A GPS-synced NTP Server for Small Cells
Base stations need accurate time for framing and synchronization; they’ll often have GPS antenna ports and provide options for NTP or PTP clock sync. But what if you have a couple base stations and you don’t want all those GPS antennas hanging near the window? You get a GPS receiver and feed it to an…
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FWFF->FWFG: Let’s add external antennas to a Nokia Flexi Zone Pico BTS
I recently acquired a dirt-cheap Nokia Flexi Zone Pico BTS (model FWFF, LTE band 2) to use for ModemManager automated testing. The problem is that the FWFF has internal antennas, and since Band 2 is licensed spectrum one of the Big Three (Verizon, AT&T, or T-Mobile) might get pretty angry with me. To solve that…