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Old version firmware for KX-TGP500B08/KX-TGP550T08

Model No.	Firmware	Size(KB)	Date	Version	Remarks
KX-TGP500B08 KX-TGP550T08	TGP5xx-DECT-22.82_HW1.fw	3,677	Jul 1,2013	22.82	Release Note
	TGP5xx-DECT-22.80_HW1.fw	3,667	Mar 28,2013	22.80
	TGP5xx-DECT-22.73_HW1.fw	3,661	Dec 4,2012	22.73
	TGP5xx-DECT-22.68_HW1.fw	3,660	Sep 27, 2012	22.68
	TGP5xx-DECT-22.58_HW1.fw	3,593	Jun 15, 2012	22.58
	TGP5xx-DECT-22.53_HW1.fw	3,571	Apr 25, 2012	22.53	Note
	TGP5xx-DECT-22.38_HW1.fw	2,888	Feb 2, 2012	22.38

Note : Do not perform a firmware downgrade. If TGP500/550 will be downgraded ,it will not work.

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