some files needed for this modem
deoobed file is for restoring the modem to original zyxel firmware. more info at https://forum.openwrt.org/t/zyxel-p-2812-current-state-and-updating-wiki/31393
found in the etc/wireless/rt2860ap folder You need the RT3062_PCI_LNA_2T2R_V1_0.bin file and rename it to rt3062.eeprom and drop it in the lib firmware folder in openwrt
the 5th till the 9th byte is the MAC address so 00 0C 43 30 62 00 is your mac address if you don't change it.
the aacc3 version is identical to the other known rt3062.eeprom file
added a snapshot from march that I compiled where the kernel is slightly smaller then 2mb and the partition is 3mb for the kernel. Needed if you want to use the snapshots or version 19 and above.