Nokia 5G21 Gateway Power Cord Connection

Hello,

Does anyone know which DC connection the Nokia 5G21 Gateway has? I am looking at a battery backup for that device to keep it powered in a power outages, and am told that the Gateway needs to have a standard 5.5*2.5mm or 5.5*2.1mm DC port for the battery UPS I am looking at to work.

Is that what the Nokia 5G21 gateway has?

Thanks!