v2.2.8-nx32-normal-iac-v12-squashfs-sdcard-bbee9a8d.img
		*Fixed the problem that the device has been running for a period of time and cannot make normal outgoing calls
		*Fixed the problem that  when there is a message on individual channels, the 5288 caller will go off-hook abnormally; Channel 2 goes off-hook without sound
		*Fixed the problem that call hangs up directly when timeout parameter calltimeout is set to 0
		*Fixed the problem that there is no beep after power off when there is MWI,
		*Fixed the problem that sending multiple registration requests resulting in rejection when connect with grandstream pbx
		*Fixed the problem that IMS line inbound To number does not match registration number
		*Fixed the problem that ports configured in do-not-disturb mode can cause number feed failure
		*Fixed the problem that interface request timeout causes the web page to force quit
		*Fixed the problem that port status voltage value does not correspond to port number
		*Fixed the problem that password change screen doesn't prompt for a password format
		*Fixed the problem that clicking disable again fails to save after opening OpenVPN
		*Fixed the problem of unconditional transfer failure.
		*Fixed MAC address problem
		*Fixed the problem that two H3 ip addresses in PCB will conflict
		*Fixed the problem that package dependency and naming exception under ovapp
		*Added temporary answer 180 parameter after adding invite
		*Added ringing state in FXS port status
		*Added XSTIM protocol support
		*Added custom Sync Down
		*Added comment to cfgdefault file
		*Added usecallerid parameter to FXO port for devices like door phone or alarm panel
		*Opened SNMP mib
		*Optimized language
		*Optimized page display 
		*Optimized analog FXS/FXO display status