Under the category of "It's good to know somebody who knows somebody", in early June, 1977 I got a tour of the nearly brand new Philly Fire Communications Center in the basement of the new PFD Headquarters at 3rd and Spring Garden Streets by then Deputy Chief Bill Richmond. We could not have been there more than 30 seconds standing behind the radio dispatcher when some Battalion Chief strikes out a second alarm...Sweet!
As I recall, all the telegraph equipment was still run by other fire alarm operators in the old alarm room in Room 626 in City Hall. Boxes were still struck on the joker to the firehouses, but only to a "mushroom' or desk tapper at the watch desk . The housewatch was still busy writing down every signal in the "Book".