PACIFIC OCEAN – Personnel Specialist 3rd Class Chansaravy Sor, from Tacoma, Wash., assigned to amphibious assault ship USS Boxer (LHD 4), talks into a sound-powered telephone during a general quarters (GQ) drill.

Boxer is underway conducting routine operations as a part of USS Boxer Amphibious Ready Group (ARG) in the eastern Pacific Ocean.
DonJulio says
…and now you know the rest of the story???????????????????????
RIBS says
Sound-powered telephones are not normally connected to a telephone exchange.