This is a flash dump from a purchased Ubiquiti UFiber Instant (UF-Instant), not a firmware update package.
SSH is disabled in flash_all.xml, but enabled in order to dump the MTD block devices.
ssh [email protected] 'cat /dev/mtd0' >dev_mtd0
SN: UBNT29F5C9ED
MAC ID: (2017C) 18E829F5C9ED
UART pins from front (SC) to back (SFP):
GND, VCC, Rx, Tx
This extract provided by @robkegeenen