@Yannt Do you mean that your SIP Phone can work with Wan2 of satelite link? If so, you can try to contact your PPPoE ISP.

It seems that ER6120 V3 still uses the firmware of 2018. Maybe the next firmware will solve the issue. If you are urgent, still can try to request a beta FW.

@Ummm_Network Maybe you mean accessing the internet by using the VPN Server as a gateway. If so, this may be related to client's setting. Refer to the FAQ if you were using the windows PC....

@Sjoske If the port LED off, maybe the switch is already broken. You can use a cable to connect two switch ports directly, for checking whether the port LED lights. If the port LED is normal, try to...

@josepc I am not familiar with the way which using hostname as identity. But switch should transfer the information whatever identity is used. If you don't mind, could you tell me how PC authorize...

@einstein It should be not safe if you use 12V. Because MC220L support 9V/0/6A. 12V will damage the product.