v2.2.7-DGW-L20x-normal-idc-v21-squashfs-combined-efi-5c2c1093.img.gz
		*Added upnp function
		*Added SoftEther VPN
		*Added NAI related parameters
		*Added ss7 related parameters 
		*Added TLS1.3
		*Added mtu option setting in WAN and MGT
		*Fixed the problem that wireshark can't parse signaling ss7 packet correctly 
		*Fixed the problem that the maxchannels parameter in DGW OEM is not used correctly
		*Fixed the problem that customer failed to test fax at TM
		*Fixed the problem that trunk Status page registration status is not correct.
		*Fixed the problem that /etc/config/network exception occurs after upgrading to the latest compiled version.
		*Fixed the problem that log management_support log page save unprompted
		*Fixed the problem that the firmware reported “exceeding 30M upload file limit”
		*Fixed the problem that the /usr/sbin/odhcpd process reports an error in bridge network mode with dual NICs
		*Fixed the problem that the firmware download via server fails on some HTTPS servers
		*Upgraded system related sys_* class to check_input2 check
		*Optimized ODG UPnP page
		*Optimized the function that T1 to E1 switch to HDB3 encoding by default
		*Optimized the function that initialization of network information is changed to read json to deal with differential, including API interface reading.