The logs showed the culprit: an automatic firmware push. The NOC had tried to update both ends from v3.7.11 to v4.0.2-beta. The near side (Denison West) had taken it. The far side (Denison East) was now a brick.
Then silence.
Marta didn’t scream. She just opened three browser tabs: the archived firmware repository, the AF-5X recovery guide, and a satellite map of the 30-mile path.
Then the alert came at 2:47 AM.
But the AF-5X’s recovery mode required physical reset on the bricked unit… unless you could exploit a known quirk in the v4.0.2-beta’s early boot sequence. She’d read a buried forum post two years ago from a ham radio operator in Finland. The trick: send a precisely timed TFTP request during the 3-second window when the radio power-cycles its RF chip.
while true; do tftp -m binary 10.0.3.88 -c put AF5X-v3.7.11.bin -t 1 sleep 11.5 done On the tenth attempt, nothing. On the twenty-third, a single acknowledgment packet came back. The East radio had bitten. But the window was only 2.7 seconds. She watched the hex dump scroll—blocks 1 through 312 of the firmware uploading at 1 Mbps over the degraded control channel.
She groaned, pulling up the dashboard. SNR had flatlined. No RF. No Ethernet. Just a heartbeat from the management IP, stubbornly blinking like a dying star. ubiquiti af-5x firmware
By dawn, the haul trucks were moving ore. The mine manager sent a one-line email: “Link stable?”
Marta didn’t panic. She switched from UDP to TCP-tunneled TFTP through the West radio’s management plane, sacrificing speed for reliability. The upload resumed. Block 312. Checksum valid.
At 3:54 AM, the East radio’s management IP reappeared. Then the SNR graph flickered: -65 dBm. Then -58. Then -52. The logs showed the culprit: an automatic firmware push
Marta replied, sipping cold coffee: “Yes. And it will stay that way.”
She scripted a loop:
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