Phoning for fish is where you take an old WWII, Korean, or Vietnam era army surplus telephone, or one of those old crank telephones found out in the barn. You split the wire and put them on the opposite sides of a creek. The fish have to basically swim between the two wires to be shocked. A small clear stream where you can see the fish is best, but people have done this from canoes in small ponds.
Some people have even paid out wire through a casting rod, with a weight tied to the end of it, to bring up channel cat. Catfish are electrical
creatures, and are attracted to it. They are also attracted to any source of electricity in the water; say, a boat motor that is shorting out or
something. They sense it in their wiskers, I think.
A family in my home town came to the ER because of phoning for fish. I think the son-in-law got zapped because he still had his hands in the water
from pulling in the last fish when Dad started cranking.
Turned out to be an impromptu IQ test; one which they failed, in my view.