J Series H.323 update
Had the same issue with the J179
I loaded SIP Firmware version J100-IPT-SIP-R4_0_0_0-011719 onto my Utility server (V7)
And updated the phone to that first
Then I loaded 96x1-IPT-H323-R6_7_1_04-11271 firmware (This also covers other H.323 phones like the 9608 and 9611's)
As the J series phone boots, break in using the CRAFT menu and scroll down to Signalling, and toggle from Default to H.323.
Restart the phone and it then takes the H.323 firmware.
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