how to update firmware netis

for tm technical use only this this the latest firmware for SBVM Netis DL4480V1 make sure use the latest version of firmware version : 2.0.9b this update is because VOBB/Voice intermittent/ disconnect click the link below for latest firmware update version : 2.0.9b https://drive.google.com/open?id=1333hR1fYDbLO_z8tFGojbcRPTdboV-V-