FirstFiber.cn

First of all, please let us know S/N number at back of OTDR. Then, our engineer will send you a software to add korean language. And then, follow these steps to upgrade your OTDR,

1) connect OTDR to PC with a USB cable
2) copy upgrade software to the root of OTDR DISC
3) disconnect from PC 
4) go to system -> general settings -> upgrade
5) Around 2 mins later, the OTDR will re-boot automatically
Do not turn off OTDR when updating.

Currently, we have these languages for customer choice when they place order,

First of all, we do not suggest users to upgrade their OTDR by themselves without negotiating with us, because we change hardware occasionally according to market supply. If any problems happen, please contact us in advace and describe the problems to our engineers. They will generate particular upgrade package for your OTDR if they think it is software (or firmware) problems. After you get the upgrade package, follow these steps to upgrade your OTDR, 

I received 2 photos. One is OTDR testing with no cable, the other is connected to cable. Then test stopped with the message, means “ there are light, test stop”. Then the cable is not live cable.

For some 980MAS OTDRs which is installed Korean language, some functions can not be controlled by physical buttons, but you still can use the OTDR as normal by touch screen. To solve the physical button problem, please download the new firmware and upgrade your OTDR by following steps,